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 AUG 201913 
 
 A RESEARCH 
 
 ON THE 
 
 Eucalypts of Tasmania 
 
 AM) THE 1 17 
 
 ESSENTIAL OILS 
 
 R. T. BAKER, F.L.S., AND H. G. SMITH, F.C.S. 
 Technological Museum, Sydney 
 
 StTY ] 
 
 Head before the Royal Society of Tasmania 
 
 Communicated by L. Rodway, Esq.. Government Botanist 
 October 14, 1912 
 
 VAIL, Government I'rinter. Hol>,n-t. Tasmania 
 
A RESEARCH 
 
 ON THE 
 
 EUCALYPTS OF TASMANIA 
 
 AND THEIR 
 
 ESSENTIAL OILS 
 
 BY 
 
 R. T. BAKER, F.L.S., AND H. G. SMITH, F.C.S. 
 Technological Museum, Sydney 
 
 Read before the Royal Society of Tasmania 
 
 Communicated by L. Rodway, Esq., Government Botanist 
 October 14, 1912 
 
 JOHN VA.HJ, 'Government Printer, Tasmania 
 
CONTENTS. 
 
 PAOK 
 
 1. ACKNOWLEDGMENTS 1 
 
 2. INTRODUCTION 1 
 
 3. SPECIES, WITH THEIR SYSTEMATIC, TECHNLOOGICAL, 
 
 AND CHEMICAL DATA ... 10 
 
 4. AVERAGE YIELD OF OIL FROM THE SEVERAL SPECIES 
 
 OF EUCALYPTUS ... ... ... ... ... ... 67 
 
 5. TABULATED RESULTS WITH THE CRUDE OILS, TOGETHER 
 
 WITH THEIR PRINCIPAL CONSTITUENTS 68 
 
 6. ILLUSTRATIONS 
 
 E. UNIALATA. SP. NOV 71 
 
 E. RODWAYI, SP. NOV. 71 
 
 E. TAENIOLA, SP. NOV 71 
 
 COLLECTING EUCALYPTUS LEAVES IN TASMANIA ... 71 
 
 7. INDEX TO SPECIES... 71 
 
 264623 
 
A RESEARCH ON THE EUCALYPTS OF TAS- 
 MANIA AND THEIR ESSENTIAL OILS. 
 
 By R. T. BAKER, F.L.S., and H. G. SMITH, F.C.S., 
 Technological Museum, Sydney. 
 
 [Communicated by L. RODWAY, F.L.S., Government Botanist. I 
 
 1. ACKNOWLEDGMENTS. 
 
 IN the preparation of this paper we have to acknowledge 
 our indebtedness to Mr. L. Rodway, Government Botanist, 
 who placed his knowledge of Tasmanian Eucalypts at our 
 disposal, and gave up much of his time to procuring 
 material. 
 
 We would also like to thank the following gentlemen for 
 assistance rendered: Messrs. T. Stephens, R. A. Black, 
 D'Arcy Addison, G. Ellis, and A. H. Higgs. 
 
 The collector, Mr. L. G. Irby, met with the greatest 
 assistance and help from every one in the island with 
 whom he came in contact in this connection, as did also 
 Mr. C. Laseron when collecting previously. 
 
 2. INTRODUCTION. 
 
 The Tasmanian Eucalypts will always possess an historical 
 interest over their confreres, as it was from Van Diemen's 
 Land that specimens of the genus were first made known 
 to science, the honour being conferred on the well-known 
 " Eucalyptus " of Tasmania E . obliqua, by L'Heritier, 
 in 1788 the " Stringy-bark colonorum/' as mentioned by 
 Hooker in the " London Journal of Botany," when 
 describing this tree under the name of E. gigantea, in 
 1847. Since that date several famous botanists have 
 worked at the genus as represented in Tasmania, the late 
 Sir Joseph D. Hooker giving special attention to it in 
 his classical work The Flora of Tasmania, published 
 in 1860. 
 
 This investigation is, however, the first that has treated 
 the subject from a technological point of view. It is 
 the work of a joint research in botany and chemistry, 
 consequently the results, as might be expected by work- 
 ing on so extended a field, are not quite in accord with 
 past classifications of these Eucalypts. 
 
2 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The economics of one at least of Tasmania's Eucalypts 
 are world-wide, those of E. glob u I us, and probably there 
 has been more literature published in connection with this 
 species than any other belonging to the whole genus. 
 
 In the United States of America it is more cultivated 
 than any other, thousands of acres being planted with it 
 as a source of timber-supply ; but its essential oil has made 
 its name better known than its wood. 
 
 However, this research now shows that Tasmania pos- 
 sesses other trees yielding oil of equal therapeutic value, 
 and what is of quite as much importance, posses several 
 other trees yielding phellandrene oils, now so extensively 
 used in mineral e|*ar?itiii" 
 
 The Eucalypts of Tasmania we make out to be as fol- 
 lows, on a cortical classification: 
 
 SMOOTH BARKS OR GUMS 
 
 * Enrti/1/ptu.'i (inrrutii. Hook. f. 
 
 * Kiirti.li/ptu8 cordata, Labill. 
 /Jnrd/i/ptu8 globvlus, Labill. 
 
 * Kurfifuptus Gunnii, Hook. 
 
 * Eiirti/i/ptt/* h'ncfir'K, A. Cunn. 
 
 * Kitcalyptus Muelleri, T. B. Moore. 
 Eucalyptus Perriniana , R. T. B. et H.G.S. 
 Eucalyptus phlebophylln , F. v. M. et Miq. 
 Eumff/pfu* regnans, F. v. M. 
 
 * Eucalyptus Risdoni, Hook. 
 
 * Eucali/pfii* u n'uil a i<i, sp. nov. 
 
 * Eumly pfii* >/r/ii(/< ni, Hook. 
 
 * Eucalyptus vernimxa, Hook. 
 
 Kiirfrfy/tfi/fi r I'M infills, Labill. 
 
 HALF-BARKS 
 
 Ki/rfiJf//ttti.< /Jrlrgflfrnsis, R. T. B. 
 
 Ki/rt//i//>fu>: //-// /////;x. F. v. M. (occasionally). 
 STRINGY-BARK 
 
 Eucalypttu obliqua, L'Her. 
 
 HARD, ROUGH BARKS 
 
 * Eucalyptus ftodwayif sp. nov. 
 Eucalypti/* rirtfafa, Sieb. 
 
 * Eucalyptus taenioUi t sp. nov. 
 
 PEPPERMINTS 
 
 Kurfili/pti/x amygdalina, Labill. 
 
 * EurriJi/pfi/* rnrrifrrfl, Hook, f. 
 
 * Endemic to Tasmania. 
 
AND THEIR ESSENTIAL OILS. 3 
 
 This brings the record up to 21, and of these no less 
 than 12 are endemic, which is a large percentage of the 
 whole number, and probably due to the great length or 
 period of isolation of Tasmania from the mainland. No 
 doubt other endemic species exist, but remain as yet unre- 
 corded, as much country is not yet opened up. 
 
 K-odway, in his " Flora of Tasmania/' estimates 17 
 species, most of which stand, with the following additions 
 and alterations. In his list we replace 
 E '. Sieberiana with E '. virgata, 
 E . haemastoma with E. Deltgatensis, 
 E . pauci flora with E . phlebophyUa, 
 while the following are added as new species : 
 E. Rodwayi, 
 E. taeniola, 
 E, unialata. 
 
 E. /incur is, Dehn., is superseded by E. I'm tt iris t A. Cunu. 
 Records new for Tasmania are 
 
 E. Delegatensis, 
 E. 1* erriniana t 
 
 and we determine two species, which had hitherto been 
 regarded as common to both the mainland and Tasmania, 
 as now distinct, viz. 
 
 E. amygdalina from E. amygdalina on the mainland, 
 
 and 
 
 E. acervula from E . paludosa. 
 
 It will no doubt come as a surprise to Eucalyptologists 
 to know that the Tasmanian E. amygdalina is not indenti- 
 cal with the species on the mainland which has for so long 
 passed under that name; but the error has probably been 
 caused through various reasons. One, 110 doubt, has been 
 the want of access to Labillardier's original specimens, or 
 at least his plate, of the species, or a wider method of 
 classification, such as this investigation covers. However, 
 we have refrained from introducing a new name into the 
 already long nomenclature, and suggest a compromise as 
 stated under E '. amygdalina. 
 
 E . radiata of Hooker's " Flora Tasmania " we have not 
 been able to place with the mainland tree of that 
 name, and are disposed to regard the remarks (loc. tit.) as 
 referring partly to material of E . amygdoHna, E . linearis, 
 or even E . Bisdoni. 
 
 E. Gunnii we consider as endemic to Tasmania, as up to 
 the present there appears no true evidence of this 
 " Cider Gum " tree occurring on the mainland. 
 
4 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 Four species previously recorded as Tasmanian are, as 
 the result of this investigation, found not to exist in the 
 island. These are- 
 
 E. luirnmxt'Htui. 
 E. Sicberianti, 
 E. Macarthuri, 
 E. Maideni. 
 
 The variety hi//irririfolia, generally placed with K. 
 amy(jfl<ilind, we find to belong to E . ///Wow, so that this 
 latter species, as now understood, includes the varieties 
 !' . fi/rif/f/dalina, var. h y per ici- folia, 
 1-1. ///Wo///, var. eh/to, 
 E. nitida. 
 
 Kin'tiltiittu* iiitiiln Hooker figures in his "Flora Tas- 
 maniae " as a distinct species, and material collected at 
 Strickland by Mr. L. G. Irby exactly matches his draw- 
 ings. Many of the botanical features of this tree we find 
 now also match forms of A'. ///Wo/// that have come to 
 light since that work was published, and these, together 
 with their chemistry, show that this Eucalyptus is no 
 other than E. ///Wo///, although the fruits may be 
 regarded as an extreme form. 
 
 Rodwav's variety 7/wvoo//-//// ot' A'. mminaKt does not 
 belong to E. glolmlu* as considered by Mueller, nor A. 
 Maideni as recorded by J. H. Maiden (A.A.A.S. 
 1902) It is now given specific rank under li 
 name of E. /////////////. It is worthy of note that 
 several groups of Eucalypts common on the main- 
 land have no representatives in Tasmania, as, for instai* 
 the " Bloodwoods," " Boxes," " Mallees," and the " Iron 
 Barks " ; and it is also of more than passing interest that 
 without exception no red-coloured timbers occur in the 
 whole group of Tasmanian Eucalypts. 
 
 Anyhow a high percentage of good timbers obtains 
 amongst these gums over those of any other State in the 
 Commonwealth, and only those of stunted growth near 
 the snow-line are to be discarded as not possessing timber 
 of economic value in some direction. 
 
 Altogether there should be a great future before the 
 forestry outlook of the State. 
 
 As certain groups of Eucalypts (supra) are found to 
 occur on the mainland only, it would at least be of scien- 
 tific interest if experiments with these could be carried 
 out by introducing into cultivation in the island those of 
 the greatest economic value on the mainland, and record- 
 ing the results. 
 
AND THEIR ESSENTIAL OILS. O 
 
 The pale-coloured hardwood timbers of Tasmania are 
 excellent, and have long occupied a front position in the 
 world's timber markets, but there is one feature worthy 
 of notice, and that is the utilisation of some of 
 these for cabinet work, such as E . obliqua and E ' . Dele- 
 gatensis as " Tasmanian Oak/' To these might be added 
 the timber of E. Rodwayi, which appears to be of equal 
 excellence in this connection. 
 
 SPECIES YIELDING COMMERCIAL TIMBERS. 
 Gums 
 
 E . acervula (Red Gum). 
 E. globulus (Blue Gum). 
 E. Gunnii (Cider Gum). 
 E. linearis (White Peppermint). 
 E. viminalis (Manna Gum). 
 E. Muelleri (Brown Gum). 
 E. Delegatensis (Gum-topped Stringy-bark 
 or Tasmanian Oak). 
 
 Stringy -barks 
 
 E. obhqua (Stringy-bark). 
 Hard, Furrowed, Compact Barks 
 
 E. virgata (Ironbark). 
 
 E. Rodwayi (Black Gum). 
 
 E. taeniola. 
 
 Peppermint 
 
 E. amygdalina (Black Peppermint). 
 
 The evidence now brought forward in this paper respect- 
 ing the affinities and differences between the Tasmanian 
 Eucalypts and identical species or allied forms growing on 
 the mainland appears to further emphasise the evolution- 
 ary differentiation of the various species, first brought for- 
 ward in our work on the Eucalypts published in 1902. 
 
 Variation in altitude and climatic conditions, the 
 result of considerable earth-movement, would naturally 
 force the species thus separated to endeavour to overcome 
 this interference, and to adapt themselves to these new 
 conditions. This environmental change would thus tend 
 to establish new features and constituents. 
 
 For instance, the affinity existing between E ' . amygda- 
 lina of Tasmania and the form of E . amygdalina growing 
 on the mainland is evidently close, yet they are not now 
 identical species, in the present acceptation of such, either 
 botanically or chemically, and the divergence has gone 
 sufficiently far for specific differences to be observed. 
 
6 A RESEARCH ON THE EUC\LYPTS OF TASMANIA 
 
 This is also the case with K. <t<-errnl(t and K. jMilnf/tnm 
 and whatever agreement there might have been originally 
 between these two species they have now diverged suffi- 
 ciently far to enable constant and well-defined differences 
 to be established. 
 
 Other species, again, in which distinctive characters 
 cannot be detected between the Tasmanian and mainland 
 trees, as K. regmin*, K. l)tl< <jnh //x/'x. K. 1'errininmi, 
 K. o Mi qua, &c., may have remained constant because the 
 conditions governing their retention in both localities 
 might have undergone comparatively little alteration 
 under the new arrangement. It will be observed that 
 these are species mostly found in somewhat high altitudes, 
 and growing in both countries under similar conditions. 
 
 Although the species supposed to be endemic in Tas- 
 mania, as K. vtrnU'osa, K. u/-nit/n-n. /:'. /.'W//v////, /;'. AV 
 doniy <fec., have no very close affinities with mainland 
 species, so far as at present known, yet it must not be 
 forgotten that each of them has its nearly related species 
 with approaching characteristics, and that they all cer- 
 tainly fall into well-defined botanical and chemical groups, 
 the peculiarities of which are now well known. 
 
 Another point, of a chemical nature, which strongly 
 supports these suggestions, is that in the oil of only one 
 species growing in Tasmania does the aromatic aldehyde 
 aromadendral occur. This constituent is common in the 
 oils of several species in Eastern Australia, notably the 
 "Boxes," of which K. //</////>// /<m/ may be considered the 
 type. These trees are generally lowland species, K. 
 /it ini/t/i/tiifi particularly being a common species of the 
 plains on the eastern side of the Blue Mountains. E. 
 obliqua is common on the mainland as well as in Tas- 
 mania, and does not appear to be so restricted to a nar- 
 row range of altitude as many species, consequently it 
 stood a better chance of survival when the subsidence took 
 place which formed Tasmania, whilst the more strictly 
 lowland species were submerged and thus destroyed. 
 
 We purpose dealing more fully with this question as it 
 affects the whole genus, at the British Association meeting 
 in Sydney in 1914. 
 
 With reference to the oils distilled from the leaves of 
 the several species, these agree in general constituents 
 with those occurring in the oils of the members of the 
 main groups, whether from species growing in Tasmania 
 or on the mainland of course varying in amount as the 
 botanical characters of the group become more defined. 
 
AND THEIR ESSENTIAL OILS. 7 
 
 The occurrence of the terpene phellandrene in the oils 
 of a majority of the species is a character of some import- 
 ance, and one which may eventually be shown to have some 
 significance in determining distribution of species. 
 
 The oil of E. Risdoni is specially worthy of mention, 
 because of the large amount of eucalyptol which occurs in 
 it, together with phellandrene. It has latterly been the 
 practice in England, America, and in Europe to demand 
 oils rich in eucalyptol (cineol) for pharmaceutical purposes, 
 and the presence of phellandrene has been looked upon 
 with considerable disfavour. But when we consider that 
 the medicinal value of Eucalyptus oil was first determined 
 on oils of the " amygdalina " group, even including that 
 of E. dives (in which eucalyptol is almost absent), it may 
 be that the present condemnation of a phellandrene-bear- 
 ing oil like E. Rixdom is hardly warranted, and is per- 
 haps, at the least, injudicious. Dr. Cuthbert Hall, of 
 Parramatta, in 1904, showed that eucalyptol when pure 
 had very little antiseptic power much less than that of 
 many other constituents of Eucalyptus oils, including 
 phellandrene. Dr. Martindale has also recently shown 
 that eucalyptol has very weak antiseptic power in com- 
 parison with many other substances. Piperitone, a constit- 
 uent of the oils of the "Peppermint" group, was shown 
 by Dr. Hall to be very energetic in its action, and this is 
 a constant constituent in the oils of E. amygdalina, 
 and E '. Risdoni. Perhaps, however, the efficacy of Euca- 
 lyptus oil is more largely due to the mixture of constituents 
 than to the action of the constituents themselves when 
 these are isolated in a pure condition. Certainly all is not 
 yet known about the therapeutic value of Eucalyptus oils, 
 and the present official conclusions in this respect appear to 
 us to have been based on insufficient experimental data. 
 Bearing in mind, however, the reputed efficacy of the other 
 constituents, it might be well to insist on a minimum of 50 
 per cent, of eucalyptol in any Eucalyptus oil to be used 
 for pharmaceutical purposes, and we do not, for several 
 reasons, suggest a less amount. If this standard is eventu- 
 ally arrived at, and phellandrene not condemned, then E ' . 
 Risdoni would be a very good species to exploit for its oil. 
 The volatile aldehydes in the oil of this species are small in 
 amount and are not at all objectionable. The above 
 remarks apply in a lesser degree to the oil of E '. linearis. 
 If oils similar to E '. Risdoni are eventually recognised offi- 
 cially, it would be necessary to reduce the standard for 
 specific gravity to 0'905 at 15 C. 
 
A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The Tasmaniaii eucalyptol-pinene oils in which phellan- 
 drene is absent, with the exception of those of E ' . globulu* 
 and E. rot-data, are inclined to be of lighter gravity than 
 the " Mallee " oils; this is due to the presence of rather a 
 larger amount of pinene, and less high boiling constituents 
 (which ire naturally heavy), but they mostly contain over 
 50 per cent, eucalyptol. The yield of oil would be, of 
 course, an important factor governing the commercial possi- 
 bility of these species for oil-distillation, and for that reason 
 the yields are given in a separate table. 
 
 The oil of E. acervula was found to be of special interest 
 from a scientific point of view, and from it was isolated a 
 solid stearoptene belonging to the paraffin series. It is 
 announced in this paper as a new constituent in some 
 Eucalyptus oils. The oil of this species also contains a 
 considerable amount of geraniol and geranyl-acetate. 
 
 The strong resemblance between the essential oil of E '. 
 Gunnii and that of E. riminalis shows a close affinity exist- 
 ing between these two species. There is rather more phel- 
 landrene and less eucalyptol present in the oil of E. Gunnii 
 than in that of E. viminalis, otherwise the oils are similar. 
 The vernacular names, " Manna Gum " for E. viminalis 
 and " Cider Tree " for E. '/////////, indicate that a sweetish 
 sap is common to both trees, and this well-known fact also 
 points to a strong chemical relationship between them. 
 
 Over 50 years ago, Hooker, in his " Flora Tasmania," 
 pointed out from botanical evidence the close agreement 
 between these two Eucalypts, a suggestion which is now 
 confirmed by the results of this investigation. Although 
 showing such close affinity both are distinct species, and 
 although E. viminalis is a common tree in Australia, yet 
 so far as we are aware E. Gunnii does not occur on the 
 mainland. 
 
 The peculiarities of the oils of the Tasmanian Eucalypts 
 will be found described under the several species, but we 
 cannot refrain from again pointing out the remarkable 
 agreement iii most instances between the oil constituents 
 of the leaves and the botanical features of the plant. The 
 practical constancy of constituents in the oils of identical 
 species, wherever growing, is again shown most distinctly 
 by the results recorded in this paper, and much trouble 
 has been taken to secure authentic data to further support 
 the previous statements concerning this very useful aid 
 towards the correct determination of the several Eucalyptus 
 species. 
 
AND THEIR ESSENTIAL OILS. 9 
 
 The commercial possibilities of the several species for 
 oil-production, in comparison with those of the mainland, 
 can be judged from the results recorded in this paper, but 
 it might be well to direct attention to the glaucous species, 
 Eucalyptus Delegatcnsis, which is generally known 
 throughout the island as " Gum-topped Stringy-bark." 
 This species is now being used somewhat extensively in Tas- 
 mania as a timber-producing tree, and it might be well, 
 therefore, to consider the advisability of utilising the leaves 
 for their oil, instead of wasting them as at present. The 
 method of extracting the oil is most simple, and can be 
 carried out by ordinary labour, nor is there required much 
 outlay for plant, as one or two 400-gallon iron tanks, fitted 
 for the purpose, is all that is necessary, provided water is 
 available. The oil of this species could be used for mineral 
 separation, for which purpose it is in considerable demand. 
 The following list summarises the species and their oil 
 relations : 
 
 Eucalypts which yield oils containing over 50 per cent, 
 of eucalyptol, the principal terpene being pinene : 
 both phellandrene and piperitone are absent: 
 E. cor data. 
 E. globulus. 
 E. Muelleri. 
 E. Perriniana. 
 E. Eodwayi. 
 E. unialata. 
 E . ur nig era. 
 E. vernicosa. 
 
 Eucalypts which yield oils containing eucalyptol, 
 pinene, and phellandrene : eucalyptol between 50 
 and 25 per cent.: 
 
 E. Gunnii. 
 E. viminalis. 
 
 Eucalypts which yield oils containing over 50 per cent, 
 of eucalyptol, in which the terpene phellandrene 
 has largely replaced the pinene : piperitone is 
 present : 
 
 E. linearis. 
 E. Eisdoni. 
 
 Eucalypts which yield oils consisting largely of phel- 
 landrene, and containing less than 25 per cent, of 
 eucalyptol: piperitone is present: 
 E . amygdalina. 
 E. cocci f era. 
 
10 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 E. Delegattnsis. 
 
 E. regnant. 
 
 K. taeniola. 
 
 E. virgata. 
 
 E. obliqua.* 
 
 Eucalypts which yield oils not readily placed in the 
 above groups : 
 
 E. acervula. 
 
 E. phlebophylla. 
 
 The altitudes given in this paper can only be considered 
 as approximate, but this, for all practical purposes, is 
 sufficient. 
 
 3. SPECIES WITH THEIR SYSTEMATIC, TECH- 
 NOLOGICAL, AND CHEMICAL DATA. 
 
 EUCALYPTUS ACERVULA, Hook. f. 
 (" Red Gum " of Tasmnn-ia.) 
 
 BOTANY. 
 
 Historical. This species was originally described by 
 Hooker in his "Flora Tasmania " (1859), but Mueller. 
 in his " Eucalyptographia " (1879), places it under E. 
 Gunnii, another species described by Hooker in the " Lon- 
 don Journal of Botany " (III. 499. 1844). Bentham, in his 
 "Flora Australiensis " (1866, Vol. III., p. 244), synony- 
 mises it under E '. Stiuirtiana, a Victorian species. Maiden, 
 in A.A.A.S. 1902, p. 377, classifies it as E. Gunnii, Hook., 
 var. (icrrrufa, Deane and Maiden, whilst Rodway, in his 
 " Flora of Tasmania " (1902), gives to it its due specific- 
 rank. 
 
 Remarks. Morphologically the herbarium material has 
 a resemblance to E. paludota, R. T. B., a mainland species 
 described in 1898 (Proc. Linn. Soc. N.S.W.), and 
 especially are the fruits alike. 
 
 Maiden (Proc. Linn. Soc. N.S.W., 1901), in a paper 
 on E. Gunnii, Hook, f., places both the mainland E. palu- 
 dosa, R. T. B., and the Tasmanian E. acervula, Hook, f., 
 under E ' . Gunnii. 
 
 . The results of this investigation show that these three 
 are distinct both botanically and chemically. 
 
 * In the oil of this species the aldehyde aromadendral replaces 
 the piperitone 
 
AND THEIR ESSENTIAL OILS. 11 
 
 E. paludosa, R. T. B., has a smooth bark, whilst E. 
 acervula, Sieb., has mostly a rough bark, and could per- 
 haps on occasions be classified with the hemiphloiae group 
 of Eucalypts. 
 
 ' The tree has usually a very bushy top, and the leaves 
 are of rather a pendulous growth." (L. G. Irby.) E. 
 paludosa is a fine typical tree, with stout outstretching 
 branches and a straight stem . The ' ' sucker ' ' leaves are 
 very different in appearance, shape, and colour from those 
 of E . Gun nil, from which species it also differs in the num- 
 ber of flowers in the umbel, bark, timber, and chemical 
 constituents. 
 
 From our investigations it would appear that the chief 
 botanical differences between E. actrvula, Hook, f., and 
 E. paludosa, R. T. B., are the timber and bark and the 
 chemical constituents. 
 
 E. acervula timber is harder, closer grained, and 
 altogether superior to that of E . paludosa. 
 
 CHEMISTRY. 
 
 Essential Oil. This material for distillation was col- 
 lected at Hobart in April, 1912. The average yield of oil 
 was 0*212 per cent. The crude oil was reddish in colour, 
 and had an odour resembling geranyl-acetate, which, 
 together with its appearance, reminded one of the oil of 
 A T . Macarthuri of New South Wales. The chief consti- 
 tuents present were dextro-rotatory pinene, laevo-rotatory 
 phellandrene, eucalyptol, geranyl-acetate, free geraniol, 
 together with a small amount of an undetermined alcohol, 
 and its ester, and what is more important from a scientific 
 point of view, a solid paraffin-like stearoptene, and a paraf- 
 fin, liquid at ordinary temperatures. The presence of such 
 a stearoptene in Eucalyptus oils has not previously been 
 recorded, but it does not appear to be peculiar to this 
 species, for traces of it in the oils from two New South 
 Wales Eucalypts have already been detected. It most 
 probably belongs to the C' n H. 2n + 2 group, as it is a 
 saturated substance. This solid aliphatic stearoptene is 
 related to a similar substance found in Rose oil, although 
 melting at a higher temperature, and it is remarkable that 
 the principal alcohol in both Rose oil and in the oil of this 
 Eucalypt is geraniol. The oil of E . Macarthuri, however, 
 does not contain it. Similar paraffins, with varying melt- 
 ing-points, have been isolated from the oils of a few other 
 plants, and in some cases from the oils of their leaves. This 
 stearoptene, from this Eucalypt, is without doubt from the 
 
1*2 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 oil of the leaves, because the trees were not in flower at this 
 time of the year. The oil of E. acervula does not agree 
 entirely in general characters with that of E ' . paludosa of 
 New South Wales, as the former contains phellandrene and 
 not much pinene, while the principal constituent in the oil 
 of E '. paludosa is pinene, and phellandrene does not appear 
 to occur in it. The esters, too, were not identical in com- 
 position. It contained, however, about the same amount 
 of eucalyptol as that of E. acervula, and the paraffin 
 stearoptene was also found in it, but in much smaller 
 quantity. The two species may therefore be considered to 
 be closely related. 
 
 The specific gravity of the crude oil at 15 C. = 0'8956 ; 
 rotation a D = - 1*1; refractive index at 18 1'4756; 
 and it was soluble in 1 volume 80 per cent, alcohol, but 
 became turbid with 4 volumes, and remained turbid with 
 further addition of alcohol in the cold, forming a flocculent 
 precipitate on standing. On warming the turbid solution 
 it became clear, but the substance was deposited again on 
 cooling. 
 
 The saponification number of the esters and free acid 
 was 32 '8 by boiling, and 21'4 in the cold with two hours' 
 contact, this represents 7*5 per cent, of geranyl-acetate in 
 the crude oil, and 4 per cent, of another ester if calculated 
 for an alcohol having a similar molecular weight. The 
 odour of geraniol in the separated oil, after saponifica- 
 tion, was most distinct and well marked, and although the 
 amount of oil at our disposal did not permit of its separa- 
 tion and purification, yet there is no doubt of its identity, 
 particularly as geraniol and geraiiyl-art-tatr are such com- 
 mon constituents in certain classes of Eucalyptus oils. 
 
 The amount of free geraniol in the oil was considerable ; 
 and another undetermined alcohol was also present. A 
 portion of the crude oil was boiled for two hours with 
 acetic anhydride and anhydrous sodium-acetate in tin- 
 usual way. The separated oil was somewhat mobile, and 
 had a marked odour of gerauyl-acetate. The saponifica- 
 tion number with this esterised oil by boiling was 105'3, 
 and in the cold with two hours' contact 69'5. This latter 
 figure represents 24*3 per cent, of ester as geranyl-acetate, 
 and indicates that 13'2 per cent, of free geraniol was 
 present in the oil, as well as 6*6 per cent, of another 
 alcohol, assumed to have the same molecular weight. 
 
 It is worthy of notice that over 50 years ago, when this 
 species was described by Hooker in his " Flora Tas- 
 maniae," he remarked that " The bruised foliage has a 
 
AND THEIR ESSENTIAL OILS. 13 
 
 much sweeter odour than is usual in the genus." The 
 discovery of geraniol and its ester in the oil not only con- 
 firms this remark, but also indicates the constant character 
 of the chemical constituents. 
 
 The acid in the original ester was separated and found 
 to be largely acetic. 
 
 On rectification of the crude oil a little acid water and 
 rather a larger amount than usual of objectionable smell- 
 ing volatile aldehydes came over below 175 (corr.). 
 Between 175-200 C. 42 per cent, distilled; between 200- 
 228 8 per cent. ; the thermometer then quickly rose to 
 255 C., and between that temperature and 285 36 per 
 cent, distilled. These fractions gave the following: 
 
 Sp. gr. at Kef. Index 
 
 15 C. Rotation a a 
 
 First fraction ....... 0-S796 .. -2-6 ... 14659 
 
 Second fraction ...... 0-8913 ... -1-2 ... 1-4688 
 
 Third fraction ....... 0-9007 ... +4-8 ... 1'4884 
 
 The residue, when poured from the still, became solid 
 when cold; this was boiled in alcohol, and the alcohol 
 separated while hot. On cooling, a crystalline paraffin-like 
 substance separated. 
 
 To prove the presence of pinene another 100 c.c. of the 
 oil was distilled, and the added two first fractions gave 
 32 c.c. distilling below 170 (corr.). This was again dis- 
 tilled, when 15 c.c. was obtained below 162. This con- 
 tained some eucalyptol, which was removed by shaking 
 with 50 per cent, resorcinol. The remaining 9 c.c. of oil 
 had a pinene odour; its specific gravity at 15 = 0'8594 ; 
 rotation an + 10; and refractive index at 18 C. 
 
 = T4699. A small quantity of phellandrene was still 
 present, but this did not interfere with the formation of the 
 iiitrosochloride, which, when purified, melted at the cor- 
 rect temperature for the pinene compound, 
 
 The eucalyptol was determined in the portion of oil dis- 
 tilling below 195 C., and the result showed that 21 per 
 cent, of that constituent was present in the crude oil. A 
 portion of the high boiling constituents was most probably 
 a sesquiterpene. 
 
 Material of this species was obtained at Little Swanport 
 in June, 1908. The oil was practically identical with that 
 of the above sample, with the exception that a little more 
 pinene was present at this time of the year. The specific 
 gravity at 15 = = 0'898, and the refractive index at 22 Q 
 
14 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 = T4715. The saponification number for ester and free 
 acid was 34*3, and the ester consisted mostly of geraiiyl- 
 acetate. The oil contained the paraffin-like substance in 
 slightly greater amount than the Hobart specimen. 
 
 The Stearoptene. When the crude oils of both consign- 
 ments were dissolved in a large excess of 80 per cent, 
 alcohol, a copious flocculent substance separated. The tem- 
 perature of the solution was 18 C. It was filtered through 
 a hardened filter, washed with alcohol, and the solid fat- 
 like substance melted on the water bath to separate adher- 
 ing water and alcohol. The amount of crude material 
 thus obtained from the oil of the Hobart sample was equal 
 to 0'764 per cent., and from the Little Swanport material 
 0-816 per cent. This method naturally wasted the oil, as 
 only such a small amount of the stearoptene was present. 
 The portion of the oil distilling above 280 C. became 
 semi-solid when cold ; this was boiled in alcohol, filtered 
 boiling hot, and the process repeated three times. On 
 cooling, the substance separated in flocks. After standing 
 some time it was filtered off and boiled in acetic ether, 
 which was found to be a good solvent for the purpose ; on 
 cooling, the substance separated, most of the impurities 
 remaining in solution. The stearoptene was but little 
 soluble in cold acetic ether, but readily in hot. The 
 crystalline fat-like substance was then boiled in alcohol 
 with a little animal charcoal, and filtered hot. In was 
 finally dissolved in chloroform and precipitated by the 
 addition of alcohol. When thus obtained it differed in no 
 respect from the corresponding material precipitated 
 directly from the oil by alcohol. 
 
 When finally purified the stearoptene was perfectly 
 white, of a paraffin-like nature, without odour, easily 
 melted, and burnt away identically in odour and manner 
 with ordinary paraffin when similarly heated and ignited. 
 The melting-point was 55 to 56 C. determined by the 
 capilliary tube method in water, and in other ways. 
 
 Under the microscope it was seen to be crystalline, and 
 when melted on glass and allowed to slowly cool, the 
 crystals polarised well in bright colours ; but these crystals 
 were not very symmetrical, but vermiform, often tending 
 to the shape of the letter S. When dissolved in carbon 
 tetrachloride, and bromine dissolved in the same substance 
 added, the colour was not removed; it was thus saturated. 
 Concentrated sulphuric acid had no action upon it in the 
 cold, nor did the usual oxidising mixture of potassium 
 bichromate in sulphuric acid act upon it in the cold, and 
 
AND THEIR ESSENTIAL OILS. 15 
 
 only slightly on continued boiling. Concentrated nitric 
 acid appeared to have no action in the cold, and it was 
 but very slowly attacked on boiling, acting in this respect 
 similarly to the paraffins themselves. A solution of potas- 
 sium permanganate in the cold had no action on it after 
 many days. It thus acted similarly to the solid members 
 of the paraffin group of the general formula C n H. 2n + 2. 
 When the alcoholic nitrate from the precipitated oil was 
 cooled in ice, a further solid substance separated, which 
 was thought to be more of the same stearoptene ; it was fil- 
 tered as cold as possible, but the solid, which was removed 
 quickly, became liquid under ordinary temperatures, and 
 remained as an oil. It was small in amount, but it is 
 apparent that at least two members of this group were 
 present in the oil of this Eucalypt. 
 
 EUCALYPTUS CORD ATA, Labill. 
 BOTANY. 
 
 Historical. This species was described by Labillardier 
 in his " Plants of New Holland," published in 1799. 
 
 Remarks. This Eucalypt is endemic to Tasmania, and is 
 in the fortunate position of having no synonyms. Deane 
 and Maiden (Proc. Linn. Soc. N.S.W., 1901, p. 125) state 
 that it grows in New South Wales, but Maiden later (same 
 Proceedings, same year, p. 551) does not appear to support 
 this claim. The species recorded for New South Wales 
 under this name is E ' . pulverulenta, Sims., as maintained 
 by one of us in a paper read before the A.A.A.S. Hobart 
 in 1902, and this contention now is supported by investi- 
 gations made by us since that date. Our researches go to 
 prove that E. cordata, E . pulverulenta, and E. cinerea are 
 specifically distinct. 
 
 CHEMISTRY. 
 
 Essential Oil. The oil of this Tasmanian species was 
 determined some years ago, and the results published in 
 our work "Research on the Eucalypts " (p. 210). The 
 yield of oil from leaves and terminal branchlets was large 
 for a rich eucalyptol-pinene oil, and was equal to 2'32 per 
 cent. 
 
 Eucalyptol was the chief constituent ; pineiie was present, 
 but phellandrene was absent. The oil was very soluble, 
 requiring only 1J volumee of 70 per cent, alcohol. The 
 
16 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 saponificatioii number for the esters and free acid was 14'8. 
 The specific gravity of the crude oil at 15 C. = 0'9138, 
 and of the rectified oil = 0'9117. The rotation a D = 
 + 8'5; and refractive index at 16 = 1'4695. The recti- 
 fied oil may be considered of excellent quality for phar- 
 maceutical purposes, judged by the present standard for 
 these oils. 
 
 EUCALYPTUS GLOBULUS, Labill. 
 
 ("Blue Gum."} 
 
 BOTANY. 
 
 Historical. This species was described by Labillardier 
 from trees growing in Tasmania, and recorded in his 
 " Voyage " (I. 153. f. 13.), published in 1799. 
 
 Remark*. Tasmania may be regarded as the home of 
 f'J. y/obu/ux, and to-day it has such a world-wide reputa- 
 tion, and is so familiar to botanists, foresters, and the 
 commercial world generally, that nothing is required here 
 to mark its identification. It is known the world over. 
 
 Its botanical and chemical characters never seem to a It IT 
 whatever hemisphere it may be planted in. 
 
 A '. (//nft u/i/.< has been recorded as far north in New South 
 Wales as Rylstone (R. T. H.. Proc. Linn. Soc. N.S.W., 
 1896). 
 
 CHEMISTRY. 
 
 (til. The oil of this species is so well known 
 that it is quite unnecessary to describe it here. It is now 
 generally recognised that wherever this species grows the 
 general characters of the oil are the same. We have deter- 
 mined this to be also the case with trees of E ' . globulus 
 growing in New South Wales, and no matter whether these 
 were growing naturally or under cultivation the oil was 
 always in agreement with that obtained from Tasmanian 
 trees. There is nothing unusual, however, about this, nor 
 is it peculiar to this species. From hundreds of analyses 
 we have now made from various species, and from 
 authentic botanical material, it is found that the chemical 
 characteristics of a Eucalyptus species are some of the 
 most constant features of the plant, and the determination 
 of these has now become of considerable aid in the botanical 
 characterisation between doubtful species and supposed 
 allied forms. 
 
AND THEIR ESSENTIAL OILS. 17 
 
 EUCALYPTUS GUNNII, Hook. f. 
 
 r i Cider Tree " or " Cider Gum."} 
 
 BOTANY. 
 
 Historical. This species was described by Sir J. D. 
 Hooker in 1844 in the " London Journal of Botany " (III. 
 499), and later in "Flora Tasmania" (I. 134. t. 27). 
 Bentham also records it in his " Flora Australiensis " 
 (1866, III., p. 246), whilst Mueller, in his " Eucalypto- 
 graphia " (1879, Dec. IV.), gives a very full description, 
 together with a plate. (See under " Remarks.") 
 
 Deane and Maiden treat pretty fully of the species, its 
 allies and affinities, in the Proc. Linn. Soc. N.S.W. 1901, 
 and later Maiden devotes special attention to the species 
 in Proc. A.A.A.S. 1902, which practically covers the 
 ground of his paper on E. Gunnii, Hook, f., read before 
 the Linn. Soc. N.S.W. in the previous year. In this paper 
 a long list of synonyms is given, together with many pro- 
 posed new varieties. 
 
 Remarks. The name E ' . Gunnii was bestowed by Sir J. 
 D. Hooker on what is known as the " Cider Tree " of Tas- 
 mania, as shown by his own writings, and repeated by Ben- 
 tham, Mueller, Rodway, and others; and this point should 
 be borne in mind when writing on the species. 
 
 Now, this " Cider Gum " Eucalyptus, as far as we have 
 been able to trace, is only found in Tasmania and only 
 there in certain localities, on the central plateau as far as 
 we can ascertain but never on the mainland of Australia. 
 In fact one of us paid a special visit to the Kosciusko 
 Ranges and their branches to search for it, but so far with- 
 out success. Of course it may be there all the same, 
 although museum collectors, settlers, schoolmasters, and 
 others have all joined in the search, but have so far failed 
 to locate it. 
 
 Whatever tree is now placed under the name it must be 
 a xtne qua non that it is identical with the " Cider Tree " 
 of Tasmania, for that was the original intention of Hooker. 
 His description accords with that particular tree, and 
 Bentham's reproduction in " Flora Australiensis " (III., 
 p. 246) equally so, for it accurately describes the material 
 in this museum obtained from the Tasmanian " Cider 
 Tree " by Mr. L. G. Irby, the museum collector, acting 
 under Mr. L. Rodway 's direction. 
 
 Mr. Irby states in this connection: " This tree gets its 
 local name from a sweet exudation which flows from it at 
 
18 A RESEARCH ON THE EUOALYPTS OF TASMANIA 
 
 certain times of the year. This exudation appears to be 
 just the sap of the tree, for by cutting the bark the sweet 
 flavour may be tasted at any time. Where wounded the 
 sap exudes, and crystallises as it flows down the side of the 
 tree. At this time of the year (May) the ' cider ' will only 
 flow in very small quantities, and cannot be collected. I 
 was informed by local residents that to obtain it in any 
 quantity it is necessary to tap the trees during the spring or 
 summer months. Like manna, this exudation is of a very 
 pleasing flavour, and is rather sought after in consequence. 
 Opossums are extremely fond of it, as also are many birds. 
 I am informed that at certain times of the year the wattle- 
 birds appear to almost live on it." 
 
 The central figure and " sucker " leaves in Mueller's 
 plate in the " Eucalyptographia " is a faithful reproduc- 
 tion of the material in our possession, upon which the 
 research has been undertaken, and known in the locality 
 from which it was obtained as " Cider Tree.'' 
 
 In this latter connection one may quote Mueller in his 
 "Eucalyptographia": The sap of at least the alpine 
 rat-/ f ti/ has not an unpleasant taste, and bush people have 
 converted it into a kind of cider." The variety in this 
 case is the original species of Hooker, and so regarded by 
 Bentham, Gunn, Oldfield, and Rodway. 
 
 "The fruits to the right in Mueller's plate (lor. dt.) 
 apparently represent those of K '. I'trrimana, which is quite 
 a distinct tree, as shown in this paper. 
 
 Herbarium material of E. acervula. Hook, f., E. palu- 
 dosa, R. T. B., and E. camphora, R. T. B., and the Cider 
 Gum, E '. Gunnii, Hook, f., are all somewhat alike, and on 
 the morphology of the fruits these species might possibly be 
 confounded ; and it is probably on these grounds that some 
 authors have regarded them as varieties of one species, but 
 when studied on a broad basis of species classification, such 
 as recommended by us, the differences are too great to 
 allow of anything but a specific rank in each case. Nor can 
 we under such a system include such good species as 
 E. maculosa, R. T. B., E. rubida, H. D. et J. H. M., as 
 proposed by Maiden (loc. cit.), with their distinct botanical 
 and chemical differences. 
 
 Timber. The timber is pale-coloured, and very hard 
 and heavy, and Mr. L. G. Irby states that it is almost if 
 not quite as hard as that of the Australian Ironbarks E. 
 panicAilata and E. crebra. 
 
AND THEIR ESSENTIAL OILS. 19 
 
 CHEMISTRY. 
 
 Essential Oil. This material was collected at Iiiterlaken 
 in May, 1912, and was distilled in the fresh condition just 
 as would be done commercially. The average yield of oil 
 from the leaves and terminal branchlets was 0'387 per cent. 
 The crude oil was dark -coloured, and had a terpene odour, 
 together with that of eucalyptol. The chief constituents 
 in the oil of this species are dextro-rotatory pinene, laevo- 
 rotatory phellandrene, eucalyptol, some sesquiterpene, and 
 a small amount of ester. 
 
 The crude oil had specific gravity at 15 C. s* 0'9014; 
 rotation a D = + T5 O ; refractive index at 1.8 =: 1'4752 ; 
 and was soluble in 4 volumes 80 per cent, alcohol. 
 
 On rectification, a small amount of acid water and vola- 
 tile aldehydes came over below 165 C. (corr.). Between 
 165-1730 - C. 30 per cent, distilled; between 173-198 C. 
 52 per cent. ; the thermometer then rose to 254, and 
 between 254-270 C. 14 per cent, distilled. The fractions 
 gave the following results: 
 
 Sp. CT. at Ref. Index 
 
 We Rotation a D . at 18 C . 
 
 First fraction 0-8813 ... +5-4 ... 1-4680 
 
 Second fraction .... 0'8930 ... -4*2 ... J-4686 
 Third fraction 0-9377 ... + 8-9 1-5013 
 
 The eucalyptol was determined in the oil distilling below 
 198 and calculated for the crude oil, which was thus 
 shown to contain 41 per cent, of that constituent. 
 
 The saponification number for the esters and free acid 
 was 6'7. The results of this investigation show the oil of 
 this species to be quite distinct from that of E . camphor a 
 of New South Wales. E . Gunnii has no value as an oil- 
 producing tree, as the yield is small, and the main con- 
 stituents only of an ordinary nature. 
 
 EUCALYPTUS LINEARIS, A. Cunn. 
 
 f" White Peppermint." ) 
 BOTANY. 
 
 Remarks. It has been customary to regard the smooth- 
 barked narrow-leaved Eucalyptus growing near Hobart, 
 and distributed throughout Tasmania generally, as this 
 species, but in going over the literature and specimens pro- 
 curable to-day it would seem that such a classification is 
 'wj-rAi correct. 
 
20 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 Bentham, in " Flora Australiensis " (III., p. 200), 
 states in connection with this and one or two other species 
 that " although evidently seen by the authors in bud or 
 in flower as well as in leaf, are far too imperfectly described 
 to render their identification possible": and Mueller, in 
 his " Eucalyptographia," under " E. aftn/f/t/aliiifi," states: 
 
 K. linruria, Dehn., seems merely to indicate a variety 
 remarkable for the extraordinary narrowness of its leaves, 
 but neither flowers nor fruits occur in authentic specimens, 
 preserved in the collection of Baron Cesari, who kindly 
 placed samples of Dehnhardt's original plants at my 
 disposal." 
 
 In Walpole's " Repertorium " (II., 164) the locality is 
 given as New Holland. 
 
 The leaves of this Tasmaman Eucalyptus are narrow, 
 but not extraordinarily so, certainly not r /'//////////'*, willowy, 
 as given by Walpole (loc. cit.), and the locality New Hol- 
 land in 1839 is suspicious that the tree was not from Van 
 Diemen's Land. 
 
 The original description is far too brief for identifica- 
 tion purposes, and as Dehnhardt's plant was probably a 
 cultivated one, it seems it is only wasting time to give it 
 any attention, especially as the original specimen in the 
 Imperial History Museum of Vienna is in bud only, and 
 is, therefore, almost worthless from a systematic point of 
 view. 
 
 It is stated that A. Cunningham collected specimens, and 
 labelled them " K. Hnettri*, Hobart Town, 1819, A. 
 Cunn./' in which case it might be surmised that this is 
 the tree ; but this is only a surmise, for the tree going under 
 the name of E '. amygdalina in Tasmania has very narrow 
 leaves in some instances, and the name " Hm-nrix " quite 
 describes them. Maiden (Proc. Roy. Soc. Tas. 1902), 
 under "K. tinearis," states that: "The upshot of my 
 investigation is that /:'. Uncuria, Dehnhardt, and K. /////- 
 chella, Desfontaines, are specifically identical. Both were 
 named from plants raised in Europe. In my Australasian 
 Association for the Advancement of Science paper I have 
 put forth a plea for a final investigation by Tasmanian 
 botanists as to whether a certain Mt. Wellington tree is 
 identical with E. linearis, Dehn., and, if so, whether it is 
 con-specific with E '. amygdalina, Labill." 
 
 We, however, think there is not sufficient evidence to 
 prove that the tree now going under the name of E '. lin?ari.< 
 is that so-called by Dehnhardt and E. pulchella by Desfon- 
 taines names founded on plants raised in Europe. But 
 
AND THEIR ESSENTIAL OILS. 21 
 
 lather than add another name to the already long list of 
 Eucalyptus species we have decided to let the name stand, 
 but give the authorship to A. Cunningham, and this will 
 accord with his specimen from Hobart (1819) at Kew and 
 bearing his name, as he has thus a priority claim to the 
 name over that of the last two authors. 
 
 The tree to which these remarks refer is the smooth- 
 barked, tall, upstanding Gum at the head of Gentle Annie 
 Falls, Hobart, but it is fairly distributed throughout the 
 island. 
 
 J) ascription of Species. It is a fairly tall tree, with 
 clean, smooth, yellow or whitish bark, sometimes rough 
 for a few feet at the base. Sucker leaves opposite or alter- 
 nate, very narrow, mostly 1 line wide and about 2 inches 
 long, on filiform rugose branchlets; only midrib showing, 
 edges thickened. The leaves (normal) narrow, lanceolate, 
 petiolate, to narrow linear, lanceolate, under 3 inches long 
 and up to J-inch wide, not shining, venation hidden in the 
 leaf texture, midrib only showing on the underside, alter- 
 nate. Peduncles axillary, with few flowers in the head. 
 Buds clavate, operculum depressed, hemispherical. 
 
 Fruits hemispherical, J-inch in diameter, slightly shin- 
 ing, on a rather slender pedicel, rim red scarcely domed, or 
 truncate, tips of the valves just exserted. 
 
 Timber. Pinkish, fissile, easy to work, and specifically 
 light, and suitable for indoor work only. 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species was obtained 
 from the Springs, Mt. Wellington, and collected in Janu- 
 ary, 1912, at a time of the year when a maximum yield of 
 oil might be expected. The average yield of oil from leaves 
 and terminal branchlets, collected as would be done for 
 commercial oil-distillation, was 1'8 per cent. The crude 
 oil was reddish in colour, caused by the small amount of 
 iron from the still, and had a peppermint odour, due to the 
 piperitone present. It contained much phellandrene and a 
 considerable amount of eucalyptol. Pinene was absent, 
 or present only in very small quantity. The specific grav- 
 ity of the crude oil at 15 C. = 0'9096; rotation a D = 
 - 10 - 2; refractive index at 24 (J. = 1*4659; and was 
 soluble in 6 volumes 70 per cent, alcohol. 
 
 On rectification, only a few drops of acid water and vola- 
 tile aldehydes came over below 173 C. (corr.), at which 
 
*22 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 temperature the oil commenced to distil. Between 
 173-188 82 per cent, distilled; between 188-290 10 per 
 cent, distilled, the greater portion (7 per cent.) above 
 260. These fractions gave the following results: 
 
 Sp. err. at Ref. Index 
 
 Rotation . F 1: C C Ut24o> 
 
 First fraction - l'2 c ... 0'8987 ... 1-4619 
 
 Second traction .... + 8-*2 t ' ... 0-9501 l-489 
 
 There is evidently a heavy, high boiling constituent in 
 the oil of this species, which has a right rotation, but it 
 was not isolated. Saponification number for the esters and 
 free acid of crude oil = 5 '8. 
 
 The eucalyptol was determined in the first fraction by 
 the resorcinol method ; this amount, when calculated for 
 the crude oil, showed that 52 per cent, of that constituent 
 was present. 
 
 Material of this species was collected at Little Swanport, 
 Tasmania, in June, 1908. The oil distilled from this 
 agreed in characters and constituents with the above. 
 Average yield of oil -- 1'38 per cent. Specific gravity at 
 150 c. == 0-9036; rotation a o = - 9'9 ; refractive index 
 at 24 = 1-4687, and was soluble in 7 volumes 70 per 
 cent, alcohol. Below 193 C. 77 per cent, distilled. The 
 eucalyptol was determined in this fraction by the resor- 
 cinol method, and gave 51 per cent, of that constituent for 
 the crude oil. 
 
 Material for this species was also collected at Nubeena, 
 Tasrnan Peninsula, in April, 1912. It agreed in general 
 characters with the oil from the previous consignments, 
 only at this time of the year rather a large amount of 
 phellandrene was present, consequently the rotation to the 
 left was higher ; the eucalyptol was also slightly less in 
 amount, but still exceeded 40 per cent, in the crude oil. 
 Average yield of oil = I'l per cent. Specific gravity at 
 15 C. = 0-9045; rotation a D = - 23' 1; refractive index 
 at 18 =i 1-4743, and it was soluble in 8 volumes 70 per 
 cent, alcohol. Below 193 C. 79 per cent, distilled. The 
 eucalyptol in this portion was determined by the resorcinol 
 method ; the result showed that 44 per cent, of that con- 
 stituent was present in the crude oil. The oil of this 
 species .somewhat closely agrees with that of the form of 
 /J . amygdalina of the mainland, both in constituents and 
 physical characters, much more so than with the oil of the 
 Tasmanian form described in this paper. 
 
AND THEIR ESSENTIAL OILS. 23 
 
 EUCALYPTUS MUELLERI, T. B. Moore. 
 
 (" Brown Gum." ) 
 
 BOTANY. 
 
 Historical. This tree was first brought under the notice 
 of Baron von Mueller by Mr. T. B. Moore, who was 
 anxious to dedicate a species of Eucalyptus to the then 
 Victorian Government Botanist. 
 
 Remarks. From the correspondence now at the Mel- 
 bourne Herbarium, which we have been able to peruse 
 through the kindness of Professor Ewart, it is shown that 
 Baron von Mueller always hesitated to name this species as 
 distinct from E ' . vernicosa. 
 
 There can be no doubt that the two are allied, but E. 
 vernicosa is a dwarf tree, whilst E. Muelleri is a very fine 
 specimen of the Tasmanian forests, and yields a first-class 
 hardwood timber in addition to a eucalyptol oil in its 
 leaves. 
 
 Its economies thus outweigh those of its congener E. 
 vernicosa, which cannot be ranked as a timber tree, and 
 thus for commercial reasons alone we think the two should 
 remain as separate species. We have seen no intermediate 
 forms between the two. 
 
 Timber. The timber was pronounced by Mr. Moore, its 
 discoverer, as extremely hard, close-grained, tough, and 
 heavy, and suitable for heavy construction work as well as 
 furniture, and in this we concur. 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species was obtained 
 from Mt. Wellington, at an altitude of about 3000 feet. 
 It was collected in July, 1908. The principal constituent 
 in the oil of this species is eucalyptol, accompanied with a 
 fairly large amount of pinene. Phellandrene was not 
 present, nor was it to be expected, judging from the 
 botanical features of the species. There was rather a large 
 amount of ester for oils of this class, and this appeared to 
 be largely geranyl-acetate, as it was mostly saponified in the 
 cold with two hours' contact. The crude oil was of a light- 
 amber colour, and had an odour resembling the oils of the 
 group of which E. Smithii may be considered the type; 
 the usual amount of volatile aldehydes was present, but 
 these were separated without difficulty on redistillation. 
 
 The average yield of oil from leaves and terminal 
 branchlets was 1'28 per cent. The crude oil had specific- 
 gravity at 15 C. = 0*9096; rotation a D = + 10'4; 
 ^efractive index at 24 C. = 1/4629, and was soluble in 4 
 
24 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 \olumes 70 per cent, alcohol. The saponification number 
 of the ester and free acid = 15'3, while in the cold with 
 two hours' contact it was 11 '7. 
 
 On rectification, the usual amount of acid water and 
 volatile aldehydes were obtained below 166 C. (corr.), at 
 which temperature the oil commenced to distil. Between 
 166-1730 44 per cent, distilled; between 173-195 45 per 
 cent. ; the temperature then quickly rose to 225, and 
 between this and 252 5 per cent, distilled. These frac- 
 tions gave the following results: 
 
 Sp. gr. at Rcf Ind-x 
 
 Rotation a D> YfiPC, at24C. 
 
 First traction -(-141 ... 0-9022 ... 1-4585 
 
 Second traction... 4- 6'6 ... 0-9141) ... 1-4593 
 Third traction.... ... 0-931.9 ... 1-4*11 
 
 The eucalyptol was determined in the portion distilling 
 below 195 by the resorcinol method, and 60 per cent, of 
 that constituent was thus shown to be present in the crude 
 oil. 
 
 The rectified oil was practically colourless, and both 
 odour and taste were satisfactory. The results obtained 
 with this oil, and also with those of A'. ///-///V//-/v/ and A'. 
 nrnirnxfi, show them all to belong to the best class of 
 eucalyptol-pinene oils, but they suffer from the defect of 
 containing rather too much pinene, consequently their 
 specific gravities are reduced below 0*91. which figure is 
 demanded by the Pharmacopoeia for Eucalyptus oils. 
 However, considerably more than half of the rectified oils 
 of these species would consist of eucalyptol, and the sup- 
 posed defect of specific gravity could easily be remedied 
 if desired. 
 
 Tt is interesting to notice how closely the oil of this 
 species agrees with that of K. vern'n-nMt. as may be seen 
 from the following table. The difference in yield is due to 
 the coarser stems and less expansive leaves of A'. 
 vernicosa : 
 
 h. Mnelli'ri. A', i-rrnicoga. 
 
 Eucalyptol-pinene oil, no phel.andrene. 
 
 Yield p<T cent... 1-28 0-807 
 
 Specific gravity 
 
 at 15 C 0-9097 0*9038 
 
 Rotation a p ... +10-4 +11-3 
 
 Refractive index At 24 C.= 1 4629 At 18 = 1-4651 
 
 S.N. esters, &c. 15-3 5-9 
 
 First fraction.... Below 173 C.= +14-1 Below 173 = + 16 '7 
 
 Second fraction . Below 195 C.= -f 6 6 Below 194 = + 9 4 
 
 Eucalyptol 60 per cent. 59 per cent. 
 
AN'I3 THEIR ESSENTIAL OILS. 25 
 
 There was rather more pinene and less ester in E ' . verni- 
 cosa, but this may be due to difference in the time of year 
 and location. The only difference worthy of notice is the 
 larger amount of ester in the oil of E '. Muelleri. 
 
 EUCALYPTUS PERRINIANA, R. T. B. e,t H. G. S. 
 BOTANY. 
 
 ll.istaricaL The history of this species can perhaps be 
 better told by reproducing the following from the museum 
 collector's letter received from Mr. L. G. Irby when in the 
 field in search of the material for this investigation: 
 
 " Mr. Ellis informed me that many years ago he dug 
 up some of these small trees, and planted them at his home 
 on the Dee. At the present time only one of them is still 
 alive, and it is about 18 inches in diameter, proving, there- 
 fore, that E . Perriniana attains some size. He states that 
 Perrin never saw the patch of trees in the bush, but that 
 he (Ellis) showed him the one he had growing at his house, 
 and that it was only this one tree that Perrin wrote about. 
 He told me this scrap of information, although I had not 
 mentioned the name of Perrin at all. Afterwards I told 
 him that Mueller had named this tree Perriniana after 
 Perrin, and the old gentleman was quite surprised, as 
 he appears to look upon this tree as his own find. I 
 mention this as it seems to prove that, thanks to Mr. Ellis, 
 I have come upon the original clump of trees from which 
 this species was first written up. Indeed, it would appear 
 that no more are known in Tasmania; at least, not 
 recorded." 
 
 It was really first announced to science by Mr. C. S. 
 Perrin, F.L.S., Conservator of Forests, Victoria, before 
 the A.A.A.S. (1890, 557). Mr. Rodway (Proc. Roy. Soc. 
 Tas. 1893, p. 181) gives additional data concerning the 
 plant. 
 
 Remarks. It appears that no other systematic descrip- 
 tion of this Eucalyptus has been published except that 
 given by us in " Eucalypts and their Essential Oils/' 
 although Rodway (Joe. cit.) gives the authorship to 
 Mueller. We certainly were under the impression that 
 Mueller had described it when writing our previous work, 
 but through the kindness of Professor Ewart we have 
 been enabled to read all the correspondence that passed 
 through the Melbourne Herbarium in connection with it, 
 and also to examine the original specimens of Perrin, and 
 find that such is not the case. 
 
26 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The remarks made by Mr. Perrin when exhibiting the 
 material before the A.A.A.S. in 1890, that " he was of 
 opinion that the new claimant would be found to be a new 
 species," are now confirmed, for our investigations show 
 that it is distinct from any previously described, and is far 
 removed systematically from K. Gunnii, Hook, f., with 
 which some affinity has been claimed for it. 
 
 The following description of this species is from our 
 work " Eucalypts and their Essential Oils " : 
 
 tft/xt CHI// fir description. A " mallee " or small tree 
 attaining a diameter of 1J feet and sometimes up to 30 
 feet in height, with a smooth bark. The broad, expanded 
 base, from which spring a number of small stems, is very 
 characteristic of this species. Branchlets terete and glauc- 
 ous. Leaves also glaucous, variable both in size and shape, 
 perfoliate, sessile cordate, orbicular, ovate, ovate-lanceo- 
 late, lanceolate elliptical, decussate, opposite or alter- 
 nate; venation faintly marked, lateral veins oblique, 
 spreading, intramarginal vein well removed from the edge. 
 Oil-glands very numerous. Flowers in short axillary 
 peduncles mostly, generally in threes, sessile or on a pedi- 
 cel. Calyx 2 to 3 lines long, 2 lines in diameter, bell- 
 shaped. Ovary flat-topped. Operculum shortly conical, 
 edge overlapping the calyx. Stamens all fertile: anthers 
 parallel, opening by longitudinal slits. 
 
 Fruits hemispherical to elongated or cylindrical, up to 5 
 lines long and under 3 lines in diameter, rim thickened, 
 capsule sunk. 
 
 Timber. A pale-coloured, rather soft, porous timber. 
 
 Habitat. There appears to be only one locality known 
 where this species occurs in Tasmania, viz., that discovered 
 by Mr. G. Ellis, who showed the tree to Mr. Perrin. It 
 grows in swampy ground (the same as on Mt. Kosciusko, 
 N.S.W. B.T.B.), about 2 miles beyond Strickland, 
 between the Ouse and Dee Rivers, 20 miles from Dee, at 
 a high elevation (1200 to 1500 feet). 
 
 It is the same as that recorded by us on Mt. Kosciusko 
 in " Eucalypts and Essential Oils ""(p. 20t>). 
 
 CHEMISTRY. 
 
 Kwntial Oil. This material for distillation was col- 
 lected at Strickland in July, 1912. The average yield of 
 oil was 1 per cent. The crude oil was reddish in colour, 
 due to the iron from the still, for when this red colour was 
 removed the oil was a light amber tint. It contained a 
 
AND THEIR ESSENTIAL OILS. 27 
 
 considerable amount of eucalypbol : pinene was present in 
 rather a large amount for a rich eucalyptol oil, and phel- 
 landrene was quite absent. Volatile aldehydes were pro- 
 nounced, and these had an objectionable odour, which is 
 usual with this group of Eucalyptus oils. The odour of 
 the rectified oil was that given by the members of this 
 class of eucalyptol-pinene oils generally. It is a very fair 
 commercial oil for pharmaceutical purposes, although the 
 piiiene is a little too pronounced. For this reason the 
 specific gravity borders on the minimum allowed, and the 
 dextro- rotation is a little too high. 
 
 The crude oil had specific gravity at 15 C. == G'9119; 
 rotation a D : + 8'90; refractive 'index at 15 = 1'4651, 
 and was soluble in 2 volumes 70 per cent, alcohol. The 
 saponification number of the esters and free acid was 10/3. 
 On rectification, a few drops of acid water and volatile alde- 
 hydes came over below 167 C. (corr.). Between 167-173 
 18 per cent, distilled'; between 173-194 72 per cent, dis- 
 tilled ; the temperature then quickly rose to 250 with only 
 a few drops, while between 250-268 4 per cent, distilled. 
 These fractions gave the following results : 
 
 Sp. gr. at Ref. Index 
 
 15 C. Cation a^ &t J50 
 
 First fraction 0-8988 ... + 13 '5 ... 1-4619 
 
 Second traction.... O9118 ... +8-6 ... 1-4631 
 
 Third traction .... 0-9256 ... -f 5 -2 ... 1-4868 
 
 The eucalyptol was determined in the portion distilling 
 below 194 and calculated for the crude oil; 68 per cent, of 
 that constituent was thus shown to be present. The recti- 
 fied oil of this species is tinged yellow, as is usual with 
 most of the oils of this group. 
 
 EUCALYPTUS PHLEBOPHYLLA, F. v. M. 
 
 (" Cabbage " or " Weeping Gum.") 
 
 BOTANY. 
 
 Historical. This tree was described by Miquel in 1856 
 (" Ned. Kruidk. Arch." IV. 140), on behalf of Baron 
 Mueller, from the Tasmaniaii specimens of Stuart. 
 
 Bentham, in his " Flora Australiensis " (Vol. III., p. 
 201), synonymises it with E. coria-cea, A. Cunningham, 
 under which species Mueller also places it in his " Euca- 
 lyptographia " (1879). 
 
 Rem.firk8.I.\\ all probability Mueller had not seen speci- 
 mens of Cunningham's E '. coriacea when he described this 
 
128 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 species in conjunction with Miquel, and so was not 
 acquainted with the New South Wales and mainland trees 
 now going under the name of E '. coriacea t that is, Cunning- 
 ham's and Sieber's tree E. pauciflora of the latter and 
 so considered he had a new species at the time, for we 
 know later he placed it under E '. coriacea. Since that date 
 it has been customary to regard the Tasmanian and main- 
 land trees as one species ; but the investigation taken in 
 connection with this paper shows that such is not the case, 
 and that the two are separate species, and so Mueller was 
 correct after all. The original name of E. phlebophi/lln 
 is thus here restored. 
 
 Mueller, however, concurs in Bentham's synonymy 
 (supra) in his " Eucalyptographia," and places Tasmanian 
 and mainland trees under E . mr'nirm in that book. This 
 lumping of species, even his own, was characteristic of the 
 Baron in his later work. Maiden, in his "Critical Revision 
 of Eucalypts," agrees with Bentham's and Mueller's later 
 classification. The original description is in Latin, and 
 therefore does not permit of the finer points of determina- 
 tion as obtains when given in English. 
 
 As far as we have been able to determine, the chief 
 differences between E. phlebopht/lld, F. v. M., and I-'. <-ri- 
 A. Cunn., are : 
 
 (1) Field Characters: Hooker, in his "Flora Tas- 
 
 mania," calls E . phlebophyUa the " Weeping 
 Gum," with generally spreading limbs and 
 weeping branches, and branchlets that hang 
 down 10 or 12 feet, and gives the height from 
 40 to 50 feet. 
 
 E '. coriacea has not this field character, but is 
 a tall, upstanding tree with large, spreading 
 branches. 
 
 (2) The leaves of E '. phlebophi/lla are rather smaller, 
 
 less coriaceous, and the venation by careful 
 observation will be seen to be different, in that 
 the lateral veins are not so long, and earlier 
 anastomise than in E. coriarrti. 
 
 (3) The operculum of E. phltbophylla is pointed, as 
 
 against the domed form of E . cornirm. 
 
 (4) The fruits are larger and " woody " compared 
 
 with those of E '. coriacea. 
 
 (5) Timber (see infra). 
 
 (6) Chemical constituents of the oil. 
 
AND THEIR ESSENTIAL OILS. 29 
 
 Maiden, in his paper on the " Tasmanian Eucalypts " 
 (Proc. A.A.A.S., p. 254), under " E. coriacea," speaking 
 of its synonym E. submultiplinervis, states : " The material 
 as far as it goes in the venation of the leaves and their 
 hooked apices, their length and breadth in the very young 
 buds, in the calyces and flowers, absolutely match much of 
 the E. coriacea from New South Wales. Bentham (' B. 
 Fl.' III. 201) speaks of this variety as a narrow, straight- 
 leaved variety of the ordinary size. E. phlebophylla, 
 F. v. M., is also interesting to the Tasmanian 
 botanist from the circumstance that Miquel (' Ned. 
 Kruidk.' IV. 140, 1856), who described the species on 
 behalf of Mueller, gave Stuart's Tasmanian specimens as 
 co-types. I have examined Stuart's specimen, and it bears, 
 in Miquel's handwriting, the words ' E . phlebophylla, 
 M.' (Mueller), with the words ' E . submultiplinervis, 
 affinis/ cancelled. (Herb., Melb.)." 
 
 The " much " (supra) is without doubt this species on 
 the mainland, and we are able to show that such does exist 
 on the Continent of Australia. Bentham's remarks (supra) 
 also describe this species all right. In the light of personal 
 knowledge it seems strange that this confounding of species 
 should have lasted so long, for the timbers alone of the two 
 are different, and the chemical characters are distinct. 
 
 Timber. This is not easily confounded with E. coriacea. 
 It is fairly light in weight, pale-coloured, dresses well, and 
 in figure is not at all unlike coachwood C eratopetalum 
 apetalum but has not the characteristic aroma. It would 
 make a good cabinet timber. 
 
 CHEMISTRY. 
 
 Essential Oil. This material for distillation was col- 
 lected at Tunbridge in June, 1912. The average yield was 
 1 per cent. The crude oil was light olive-brown in colour, 
 had a terpene-like odour, and consisted principally of 
 laevo-rotatory pinene ; it also contained phellandrene, 
 eucalyptol, and eudesmol. This last constituent crystallised 
 from the high boiling fraction. This is not the first time 
 that a pinene oil has been distilled from the so-called 
 " Cabbage Gum," so that the species is common to both 
 Australia and Tasmania. Oil was first distilled from this 
 Eucalypt by Mr. Marsden, at Muloon, near Boro, New 
 South Wales, in February, 1908, and was brought under 
 our notice by Mr. Farrell, of the Australian Eucalyptus 
 'Oil Company, on account of its strong odour of turpentine, 
 
30 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 and its low boiling point. It was a colourless oil as it 
 had been rectified and contained a very small amount of 
 eucalyptol. It consisted almost entirely of laevo-rotatory 
 pinene, with a little phellandrene. In September, 1910, 
 Air. Farrell noted this species growing at Monga, New 
 South Wales, and he caused it to be distilled, and sub- 
 mitted the crude oil to us for investigation. The oil was 
 light olive-brown in colour, had an odour of turpentine, 
 was very mobile, and besides consisting largely of laevo- 
 rotatory pinene, contained small quantities of phellandrene 
 and eucalyptol. Even more pinene was present than in the 
 Tasinanian oil, but this may be due to the difference in the 
 time of the year, or partly to the mode of distillation, as 
 the Monga oil had been distilled from an ordinary pot- 
 tank still, which naturally does not bring over the high 
 boiling constituents so completely as when the steam is sup- 
 plied from a boiler. The Monga oil had specific gravity 
 at 15 C. =0-8766; rotation a n = 32*5 ; refractive 
 index at 15 = 1'4702 ; and contained 11 per cent, euca- 
 lyptol, and over 80 per cent, of the total oil distilled below 
 1700 c. (corr.). 
 
 The oil from the Tasmanian trees had specific gravity at 
 15 C. = 0-8925; rotation a D = - 22'4 ; refractive index 
 at 18 = 1'4761 ; and was insoluble in 10 volumes 80 per 
 cent, alcohol. The saponification number for the esters 
 and free acid was 3'2. The ester is thus very small in 
 amount. 
 
 On rectification, a very small amount of acid water and 
 volatile aldehydes came over below 157 C. (corr.). 
 Between 157-172 C. 66 per cent, distilled; between 
 172-192 9 per cent. ; the temperature then quickly rose to 
 265, only a few drops distilling, and between 265-282 
 20 per cent, distilled, which apparently largely consisted 
 of a sesquiterpene. These fractions gave the following 
 results : 
 
 Sp. Gr. at Ref. Index 
 
 15C. lotationa D . 
 
 First fraction ...... 0-8710 ... 35'2 ... T4f)67 
 
 Second fraction... 0'88<>9 ... -21'2 ... P468 
 Tnird fraction.... 0-9418 ... ... 1-5019 
 
 The eucalyptol was determined by the resorcinol method 
 in the portion distilling below 192 C., and when calcu- 
 lated for the whole oil gave 9 per cent, of that constituent, 
 The pinene was determined in the first fraction, and an 
 amount equal to 30 per cent, of the total oil came over 
 
AND THEIR ESSENTIAL OILS. 31 
 
 between 156-157 C. It had a marked odour resembling 
 ordinary turpentine; specific gravity at 15 C. = 0*8661; 
 rotation a D 38*1: and refractive index at 18 
 = T4659. The nitrosochloride was easily prepared with 
 it, and this melted at the correct temperature. It may be 
 assumed, therefore, that 50 or 60 per cent, of the oil of 
 this Eucalyptus consists of laevo-rotatory pinene, and this 
 is confirmed by both the Monga and Muloon samples. 
 Whilst the chief constituent of the oil is pinene, that of the 
 oil of E '. coriacea is phellandrene. 
 
 EUCALYPTUS REGNANS, F. v. M. 
 f" Swamp Gum.") 
 
 [SYN. : E. gigantea, Hook. f. (" Fl. Tas."), partim. 
 
 E. gigantea, Hook. f. (" Lond. Journ. Bot." VI. 
 479. 1847), partim. See remarks under E. 
 obliqua, this paper.] 
 
 BOTANY. 
 
 Historical. This Eucalyptus was first brought under the 
 notice of the scientific world by Baron von Mueller in 
 1870 (Report of Ace. Soc. Viet. 7th Rep., p. 48). 
 Although included by Mueller under E. amygdalina in 
 his " Eucalyptographia " when referring to the giant trees 
 of the Dandenong Ranges, yet he did not give a full 
 botanical description of it till 1887-8 (" Key to Sys. of 
 Viet. Plants," p. 236). 
 
 Maiden, in his " Critical Revision of Genus Eucalyp 
 tus " (1905) synonymises E. fastigata, Deane and Maiden 
 (Proc. Linn. Soc. N.S.W. 1895), under this species. 
 
 ^Bf marks. Hooker, in his " Flora Tasmanise," under 
 " E. gigantea," gives a composite description covering 
 three species of Eucalyptus, and this is one of them (the 
 " Swamp Gum "), the other two being E. obliqua (the 
 " Stringy-bark ") and E . Delegatensis (the " Gum-topped 
 Stringy-bark "). 
 
 This tree is found to occur in Tasmania in similar situ- 
 ations and gregarious with E . obliqua, as on the mainland 
 in Victoria, and is one of the trees referred to by Hooker 
 (loc. cit.) when he states: "This forms a gigantic tree; 
 and specimens have been felled in the valleys at the base 
 of Mt. Wellington 300 feet high and 100 feet in girth." 
 E '. Delegatensis does not occur in the valleys at the base 
 o" Mt. Wellington. 
 
32 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 In our work on " Eucalypts and Their Essential Oils ' 
 (1902, p. 145), under " E. fa.<f if/at <i," occurs the follow- 
 ing : 
 
 " The authors of this species (Deane and Maiden) are 
 inclined to regard it as not specifically different from A. 
 regnans, of Mueller (Proc. Linn. Soc. N.S.W., 1889, 
 p. 460). We, however, prefer to consider these two 
 Eucalypts as distinct, for Mueller's description of the 
 latter species (Report Acclim. Soc. Viet. 1870) is so 
 very clear and precise that he could hardly have con- 
 founded the material of E. fastigata when describing E. 
 regnans. Specimens of E. fastigata were first sent by 
 W. Bauerlen from Delegate to Baron von Mueller under 
 the name of " Cut Tail," who hesitatingly named it 
 /:'. amygdalinciy var., showing that he never associated it 
 with his E. regnans, a species of his own collecting." 
 
 Although written over 10 years ago, our researches since 
 with these two species have not led us to alter the wording 
 in any way. In fact, they have brought to light new facts 
 which substantiate our contention that the two are dis- 
 tinct. 
 
 The material of E. fa*t'ujata now in this museum lias 
 been collected at Rylstone, Kirkconnell near Bathurst, 
 Bowral, Monga, and Delegate, and in every case are all 
 identical. A tree, therefore, with such a constancy <n 
 characters over such a range should, we think, carry more 
 than a varietal rank. The material of E. />////>///> has 
 been obtained from Yarra Junction, Victoria, and now 
 from Mt. Wellington, Tasmania, and agree in every par- 
 ticular with each other, and at the same time show a dis- 
 tinct difference from E. fastigata. 
 
 It perhaps would not be out of place if a few notes were 
 given here that would assist others in the differentiation of 
 the species. 
 
 E. faiftif/dtfi is best detected by its fruits, which liav.- 
 domed, red-rims, and slightly exserted valves. 
 
 E. i-nj mius fruits, although pear-shaped like those of 
 its congener, have a truncate or counter-sunk rim; and 
 these two features are the best to distinguish the species 
 morphologically . 
 
 The peduncles are often in pairs in each case. The seed- 
 ling leaves differ, for in E. raj nans they are very broad, 
 almost ovate, and in E. iaxtinata lanceolate. The bark 
 of E. taxt'njata is invariably rough and stringy, 
 and E. r<-</mms is mostly smooth hence its com- 
 mon name " Giant Gum " of Victoria. The timbers, 
 
AND THEIR ESSENTIAL OILS. 33 
 
 although both pale-coloured and specifically light, yet have 
 a specific difference, E. regnans being the more fissile. 
 Then, again, their ecology is not in accord, for each seems 
 restricted to its one particular geological formation, and 
 K. rtgnans is found near water and damp grounds or 
 sides of gullies, whilst E '. fastigata favours a dry hillside 
 locality. The two are also chemically distinct. 
 
 Habitat. E. regnans, so far as our observations go, is 
 restricted to Victoria and Tasmania. 
 
 CHEMISTRY. 
 
 Essential Oil. This material was collected on Mt. Wel- 
 lington, Tasmania, in July, 1908. One sample of leaves 
 with terminal branchlets was collected at a height of about 
 2000 feet above sea-level, and another at about 2500 feet. 
 This tree is known locally in Tasmania as " Swamp Gum/' 
 The oils from both consignments were alike, showing that 
 a difference in altitude has little influence on the secreted 
 oil. The composition of the oil was also in agreement 
 with that of E '. regnans, from material kindly sent for dis- 
 tillation from Yarra Junction, Victoria, by Cuming, 
 Smith, and Company. This is shown from the appended 
 results, and is particularly marked with those derived 
 from the several fractions. The comparative absence of 
 dextro-rotatory pinene in the oil of E. regnans shows it to 
 be a species distinct from E. fastigata, irrespective of 
 botanical differences. 
 
 The oil of E. regnans consists largely of the terpene 
 phellandrene, and contains a fair quantity of the stearop- 
 tene eudesmol. This substance was obtained in larger 
 amount than is usual, by increasing the pressure of steam 
 considerably, after the oil had distilled off in the usual 
 manner, and allowing the distillate to remain for some 
 hours in open vessels ; it could then be removed as a 
 crystalline fat-like mass from the surface of the water, 
 and purified in the ordinary way. 
 
 The presence of eucalyptol was doubtful in the portion 
 distilling at about 176C., so that this frequent constit- 
 uent in Eucalyptus oils is only present in traces in that 
 of E ' . regnans. The ester appears to be almost entirely 
 geranyl -acetate, as it saponified readily in the cold, ani 
 the ketone piperitone is also present in small amount. A 
 considerable portion of the oil consists of high -boiling con- 
 stituents, probably a sesquiterpene largely ; and this high- 
 boiling portion soon became solid in the bottle, caused by 
 the presence of eudesmol. 
 
34 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The crude oils were reddish in colour, due to the action 
 of the acetic acid on the iron of the still. On removing: 
 the colour the oil was of a light-primrose tint. The two 
 samples of oil had the following character^ : 
 
 Altitude 2oOO feet. Altitude 2000 feet. 
 Yield of oil (percent.) ... 0-823 0-782 
 
 Rotation a D 28*4 a D - 31-1 
 
 Specific gravity at 15 C. 0-8802 0-8879 
 
 Refractive index at 20 C. 1 '4882 1-4901 
 
 Soluble In 5 vols. 70/ In 5 vols. 70/ 
 
 alcoh. by weiernt alcoh. by weight 
 
 Eucalyptol Practically absent Practically absent 
 
 Eudesmol In quantity In quantity 
 
 Phellandrene In abundance In abundance 
 
 S.N. of ester and free arid 13-2 S.N. = 15-4 
 
 One of these oils was then rectified. The results are 
 tabulated with those obtained with the oil of this species 
 from Yarra Junction, in Victoria. Both oils commenced 
 to distil at 170 C. (corr.) 
 
 Tasmanian Oil. Victorian Oil. 
 
 170-176C 12 per cent. 10 per cent. 
 
 176-190 C 48 per cent. 35 per cent. 
 
 190 240 C 10 percent. 4 per cent. 
 
 240 280C 23 percent. 45 per cent. 
 
 Specific gravity at 15 C., first fraction 0-8532 0-8531 
 
 Ditto, second fraction 0-8559 0-85<> 
 
 Ditto, third fraction 0-8818 0-8845 
 
 Ditto, fourth fraction, bi-ton- 
 
 solidification 0'9515 Not taken, soon 
 
 solid 
 
 Rotation a Dj first fraction 41-8 a Q = - 49-7 
 
 Ditto, second fraction 40-2 a D = - 46-4 
 
 Ditto, third fraction Lightdidnot Lightdidnot 
 
 pass pass 
 
 Refractive index at 20 C., first 1-4796 At 19 C. 1 -4761 
 
 Ditto, second 1-4821 ditto 1-4801 
 
 Ditto,third 1-4852 ditto 1-4851 
 
 The higher laevo-rotation of the first fraction over that 
 of the second fraction, together with other indications that 
 dextro-rotatory pinene was absent, and these, along with 
 
AND THEIR ESSENTIAL OILS. 35 
 
 the want of eucalyptol, show the oil to be distinct from 
 that of E. fastigata. (See " Research on the Eucalypts," 
 p. 146, for data concerning the oil of that species.) The 
 saponification number of the Victorian oil was 12'4. The 
 comparatively small yield of oil from the leaves and 
 branchlets of E ', r eg nans renders this species of little value 
 as an oil-producing tree, and quite a number of Eucalypts 
 are now known which yield phellandrene oils in much 
 greater abundance. 
 
 EUCALYPTUS RISDONI, Hook. f. 
 (" Blue Peppermint.' 1 ) 
 BOTANY. 
 
 Historical. This species was described by J. D. Hooker 
 in his " London Journal of Botany," published in 1847, 
 but was synonymised by Mueller under E '. amygdalina in 
 his " Eucalyptographia " (Dec. V.). 
 
 Remarks. Those given in our work on the " Eucalypts 
 and their Essential Oils " (p. 208) apply equally well 
 to-day. 
 
 They read as follows : " The life history (if one may use 
 the expression in this connection) of this Eucalyptus is 
 identical with that of the mainland species E. dives , 
 Schau., in that it flowers and fruits when quite a small 
 shrub, and when all its leaves are in the opposite, sessile, 
 cordate form. Singularly enough, both Hook. f. and 
 Schauer founded their species on the shrubby form only, 
 and in the case of E ' . dives it was not, till shown by this 
 research that the mature trees became identified, whilst 
 Hook. f. figures and describes (loc. cit.) what has since 
 been shown to be the primary stage of growth of his 
 species, the mature trees of which are recorded by Ben- 
 tham in his ' Flora Australiensis ' (III., 203) as var. elata 
 on material collected by Gunn. The dried material 
 of the early and mature forms of this tree, when compared, 
 would easily mislead one not acquainted with the trees in 
 the field. Mueller unites E. Eisdoni altogether with 
 E. amygdalina, but our results agree with those of J. D. 
 Hooker and Oldfield, and in no way do we see so close an 
 affinity between these two trees." 
 
 Rodway, in his "Flora of Tasmania," follows Ben- 
 tham, and records a variety elata. Our investigations, 
 however, show that the trees growing at the foot of Mt. 
 Wellington, and regarded by Rodway as var. elata, are 
 merely taller trees of the species, and differ in minor 
 respects only, botanically or chemically, from the smaller 
 trees or shrubs. 
 
36 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The tree collected by Gunn at Lake St. Clair and upon 
 which Bentham founded the variety elata, is just possibly 
 E. Delegatensis. 
 
 The variety hi/in-r'n-i folia of E. ainygdalma recorded by 
 Bentham is found by us to belong to E ' . Risdom . 
 
 Mr. T. Stephens informs us that A'. AWo/// only grows 
 on mudstone formation geologically classed as Upper 
 Pakeozoic, Permo-Carboniferous. 
 
 CHEMISTRY. 
 
 Essential Oil. The results obtained with the oil of 
 E. Risdoni are recorded in our work " Research on the 
 Eucalypts " (p. 209). The yield of oil then obtained was 
 1'35 per cent. ; saponification number for ester and free 
 acid = 27' 1; eucalyptol 64 per cent, in the fraction, and 
 95 per cent, distilled below 198 C. It contained phel- 
 landrene, and was exceedingly rich in eucalyptol for a 
 phellandrene-bearing oil. 
 
 To enable the present research to be somewhat complete, 
 we obtained material for distillation of the reputed 
 E. Kixt?oni, var. elata, from Mt. Wellington, collected in 
 August, 1912. The results show the oil to be in agree- 
 ment with that of the ordinary form previously deter- 
 mined. 
 
 We also received material for distillation of the so-calle.{ 
 K. amygdalina, var. In/ iicri'ifolin, collected by Mr. Irby. 
 near Hobart, at the end of April, 1912, under the kin.l 
 direction of Mr. Rod way. This also gave results identical 
 with those of E. RimJoni, and as the botanical features 
 are also in agreement with that species, we consider it to 
 be K. Risdoni. The chief characteristics in the oil of 
 K. Jtixtlo/ii are that it contains over 55 per cent, of euca- 
 lyptol ; a somewhat large amount of phellandrene; belongs 
 to the " peppermint " group, as it contains some piperi- 
 tone ; has a somewhat high saponification number by boil- 
 ing, and a low one by the cold saponification method : 
 gives over 90 per cent, distilling below 195 C. ; and has 
 scarcely any objectionable volatile aldehydes. 
 
 The crude oil of E. Rimlimi (supposed variety elata} 
 from Mt. Wellington was lemon-yellow in colour, and 
 responded to all the tests and requirements recorded above. 
 Average yield of oil = T52 per cent. Specific gravity at 
 15C. = 0-9061 ; rotation a D - 14' 1 ; refractive index 
 at 18 1'4679, and was soluble in 3 volumes 70 per cent. 
 
AND THEIR ESSENTIAL OILS. 37 
 
 alcohol. The slightly larger amount of phellandrene and 
 correspondingly less eucalyptol at this time, accounts for 
 the differences in amount of rotation, in gravity, and 
 solubility to those previously recorded. On rectification, 
 only the usual amount of acid water and volatile alde- 
 hydes came over below 173 C. (corr.). Between 
 173-184 82 per cent, distilled, and between 184-195 
 11 per cent, distilled. These fractions gave results as 
 follows : 
 
 Sp. gr. at Ref. Index 
 
 15 C. Rotation a D . at 18 C. 
 
 First fraction 0-8995 ... 16*6 ... 1-4655 
 
 Second fraction .... 0-9010 ... 9'3 ... 1-4628 
 
 The eucalyptol was determined by the resorcinol method, 
 the result indicating 58 per cent, of that constituent in 
 the crude oil. The saponification number of the esters 
 and free acid by boiling was 21'3; and in the cold, with 
 two hours' contact, 5'5. 
 
 The supposed variety hypericifolia gave a light amber- 
 coloured oil, having a somewhat pleasant odour; the aver- 
 age yield was T24 per cent., and the oil agreed in all 
 respects with the requirements for that of E '. Risdoni. 
 
 The specific gravity of the crude oil at 15 C. = 0'9045; 
 rotation a D = - - 14'6; refractive index at 19 = 1'4660, 
 and was soluble in 5 volumes 70 per cent, alcohol. The 
 saponification number of the esters and free acid by boil- 
 ing was 23 '8 ; and in the cold, with two hours' contact, 3' 9. 
 It is thus evident that the main ester in the oil of E . Ris- 
 doni is not geranyl-acetate. 
 
 On rectification, only a few drops of acid water and 
 volatile aldehydes came over below 173 C. (corr.). These 
 aldehydes had no objectionable odour. Between 
 173-198 94 per cent, distilled. This had specific gravity at 
 15 0'8991 ; rotation a D = 15 '4; refractive index at 
 190 = 1-4641. The comparative absence of high boiling 
 constituents is worthy of notice. 
 
 The eucalyptol was determined by the resorcinol method, 
 and gave 56 per cent, calculated for the crude oil. 
 
 If these results are tabulated it can be seen at a glance 
 how closely the oils agree in general characters, and, allow- 
 ing for the slight increase in eucalyptol and Jess phel- 
 landrene at the time of distillation, with the type of 
 E. Risdoni also. 
 
38 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 Supposed Variety So-called Variety 
 elata. hypericifolia. 
 
 Yield of oil 1 2 per cent. 1-24 
 
 Rotation a D -14-1 -14-0 
 
 Specific gravity at 15 C. ... 0*9061 0-9045 
 
 Refractive index at 18 1-4679 At 1 9= 1-4660 
 
 Eucalyptol 58 per cent. 56 percent. 
 
 S.N., hot method 21-35 23-8 
 
 S.N., cold method 5-5 3'9 
 
 Boiling, between 173-195... 93 per cent. Bet. 173-198 94/ 
 
 Soluble In 3 vols. 70/ In 5 vols. 70 / 
 
 alcohol alcohol 
 
 Material of trees growing at Strickland, and thought by 
 the collector to be K. radiutu, as the fruits were more 
 clustered than usual, was obtained in August, 1912. The 
 oil distilled from the leaves of these trees shows them to 
 be E. Risdoni also, and it responded to all the tests 
 required for the oil of that species. The yield of oil was 
 1-5 per cent.; specific gravity at 15 C. ---. 0*9079 ; rota- 
 tion a D = - 9*9; refractive index at 15'5 = 1'4698; 
 and was soluble in 5 volumes 70 per cent, alcohol. The 
 eucalyptol, determined by the resorcinol method, was 58 
 per cent, in the crude oil. The saponification number by 
 boiling was 21' 1 ; and in the cold, with two hours' con- 
 tact, 6' 6. The presence of amyl-acetate in the portion 
 first distilling was also indicated by the pear odour, after 
 the aldehydes had been removed, and this odour was fur- 
 ther intensified after acetylation. 
 
 EUCALYPTUS UNIALATA (sp. nov.). 
 [SYN. : E . viminalis, var. nuK-mcai'im.] 
 (Plate I.) 
 BOTANY. 
 
 Historical. Maiden, in the A.A.A.S., 1902, records 
 this Eucalyptus under the name of K. Mauhni, F. v. M., 
 but Rodway, in his " Flora of Tasmania," places it under 
 E. v%minal%9 t var. -mncrocarpa. 
 
 Remarks. It is a particularly rare tree apparently, for 
 after much search by the museum collector, Mr. Irby, only 
 two trees were found, and those on Mt. Nelson. The 
 original tree discovered by Mr. Rodway is at Proctor's- 
 road (Mt. Nelson), 5 miles from Hobart, and is about 
 30 to 40 feet in height, and about 12 inches in diameter. 
 " Bark flaky at the butt, smooth above, very similar *o 
 E. viminalis." Mueller considered it a form of E. glob- 
 ulus, and J. H. Maiden a form of E. Maideni, F. v. M. 
 
AND THEIR ESSENTIAL OILS. 39 
 
 (Rodway, " Fl. Tas.," p. 57). The herbarium material 
 generally differs in several respects from all those species, 
 and so we have been induced to record it as a new species. 
 The buds are in threes, just as in E '. viminalis, and that 
 is the only resemblance to this species in the inflorescence. 
 The fruits and buds are distinct in shape from those of 
 E. globulus and E. Maideni, and what is of greater sys- 
 tematic importance, the leaves of both forms match neither 
 of these. 
 
 In the angularity of the buds are traces of a resemblance 
 to E. goniocalyx, but as these mature in the fruit the 
 angles disappear, but traces remain and form distinct con- 
 vex ridges extending from the rim to the base, and as 
 one is generally much more pronounced than the others, 
 it is upon this character that the specific name is bestowed. 
 Systematic Description, A tree attaining a height of 
 30 to 40 feet and a diameter of 12 inches, with a flaky 
 bark at the butt. Sucker leaves, sessile, opposite, oval at 
 the first, the lower pairs nearly always so, up to 2 inches 
 long and 1 inch wide, then cordate, acuminate, up to 3 
 inches long and 1J inch wide. Normal leaves lanceolate, 
 falcate up to 9 inches long and 1 inch wide, subcoriaceous, 
 occasionally shining on the upper surface. Venation dis- 
 tinct, lateral veins moderately oblique, intramarginal vein 
 removed from the edge. Branchlets in sucker growth 
 terete, but angular at first on the others. Peduncles 
 axillary, flattened, short, thick, J-inch long, three sessile 
 flowered. Calyx, compressed, angular, under J-inch long; 
 operculum conical. 
 
 Fruit hemispherical, J-inch in diameter, shining, rim 
 thickened, convex with a very narrow groove below it, 
 valves well exserted. 
 
 Arbor altitudinem 40' attinens, ramulis validis 
 superne quadrangulatis. Folia opposita sessile 
 oval v. cordata acuminata 2-3" longa, v. fal- 
 cato-lanceotata 9" longa, 1" lata, obscure pen- 
 nivena, vena peripherica a margina remotius- 
 cula. Pedunculi axillari, brevi 3'" longi, com- 
 planati 3 flori ; calyx tubus compressus circiter 
 2'" longus cum operculo conico obtuso. 
 
 Fructus hemispherici, vitrei unialata, 6'" 
 longi; margo orassus valva exserta. 
 
 CHEMISTRY. 
 
 Essential Oil. This material was collected near Hobart 
 in August, 1912. It was quite fresh and green when 
 
40 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 received at the Museum. The average yield of oil from 
 leaves and terminal branchlets was 0*897 per cent. The 
 crude oil was light-amber in colour, and had an odour 
 resembling that of the crude oil of K. globuluv. It was 
 fairly rich in eucalyptol, and contained dextro-rotatory 
 pinene, while phellandrene was absent. The saponifica- 
 tion number was somewhat high, and the oil. contained 
 rather a large amount of high boiling constituents. The 
 rectified oil had a distinctly yellow tinge. 
 
 The crude oil had specific gravity at 15 = 0'9179 ; 
 rotation a D = + 3'1; refractive index at 18 = 1-4690 : 
 and was soluble in If volumes of 70 per cent, alcohol. On 
 the addition of about 10 volumes of this alcohol the oil 
 became again somewhat turbid, indicating the presence of 
 traces of the solid paraffin found in the oil of E '. acervula. 
 
 On rectification, a small amount of acid water and some 
 volatile aldehydes, having an objectionable odour, came 
 over below 170 C. (corr.). Between 170-193 83 per 
 cent, distilled, and between 193-268 11 per cent, dis- 
 tilled, mostly above 260. These fractions gave the fol- 
 lowing results : 
 
 8p. BT. at Ref. Index 
 
 l.^C. Rotation a D . ftt 18o 
 
 First fraction 0-9104 ... + 4-3 ... 1-4632 
 
 Second fraction 0-9294 ... ... 1-4909 
 
 The eucalyptol was determined in the first fraction by 
 the resorcinol method, with the result that 62 per cent, 
 of that constituent was shown to be present in the crude 
 oil. 
 
 The saponification number for the ester and free acid 
 was ll'l. 
 
 EUCALYPTUS URNIGERA, Hook. f. 
 
 f" Urn Gum.") 
 
 BOTANY. 
 
 Historical. J. D. Hooker first, recorded this species in 
 1847, in his " London Journal of Botany " (VI. 477), 
 although it had previously been collected by Robert Brown 
 many years previously. 
 
 Remarks. It is a species that is endemic to Tasmania, 
 and fortunately has no synonyms. The fruits are charac- 
 teristic, and so the specific name is a good one. Hooker 
 describes it as small, but Rodway refers to it in his " Flora 
 of Tasmania " as a " rather tall tree." 
 
AND THEIR ESSENTIAL OILS. 41 
 
 CHEMISTRY. 
 
 Essential Oil. This material for distillation was 
 obtained at Mt. Wellington, at an altitude of about 2500 
 feet. It was collected in July, 1908; and this being, the 
 depth of winter, the yield is probably less than would be 
 obtained generally, as this species most likely follows the 
 rule in this respect. The principal constituents in the oil 
 of this species are dextro-rotatory pinene and eucalyptol, 
 over 60 per cent, of the latter constituent being present. 
 Phellandrene does not occur, nor were either eudesmol, 
 piperitoiie, or aromadendral detected. The ester is pro- 
 bably geranyl-acetate largely, as the greater portion was 
 saponified in the cold with two hours' contact. The small 
 amount of high boiling constituents in the oil of this 
 species causes it to have a specific gravity below 0'91 at 15 
 C., while the presence of the pinene in rather large excess 
 gives a somewhat high dextro-rotation. The rectified oil, 
 however, is practically colourless almost water-white 
 and it has, for an ordinary Eucalyptus oil, a very agreeable 
 odour, and no objectionable flavour. The average yield 
 of oil from leaves with terminal branchlets was 1'132 per 
 cent. The crude oil was reddish in colour, as is usual with 
 oils of this class when the leaves are distilled from iron 
 digesters. Its specific gravity at 15 C. 0*9088; rota- 
 tion a D = + 11-8; refractive index at 23 C. = 1'4638; 
 and it was soluble in 5 volumes 70 per cent, alcohol by 
 weight. 
 
 On rectification, the usual amount of acid water and 
 volatile aldehydes, from oils of this class, were obtained 
 below 165 C. (corr.). Between 165-174 C. 54 per cent, 
 distilled; between 174-193 C. 36 per cent.; the ther- 
 mometer then quickly rose to 230, and between that 
 temperature and 246 C. 5 per cent, distilled. 
 
 R/ ^ t Sp. Gr. at Ref. Index 
 
 &D - Ifio C. at23r. 
 
 First fraction +15-7 ... 0'9001 ... 1-4599 
 
 Second fraction ... + 6-4 ... 0-9165 ... 1-4602 
 
 Third traction ... 0-9285 ... 1-4836 
 
 The eucalyptol was determined in the oil distilling below 
 193 C. by the resorcinol method, which result showed 
 that 63 per cent, of that constituent was present in the 
 crude oil. The saponification number of the ester and free 
 acid = 18'3. In the cold, with two hours' contact, it 
 was 10-7, equal to 3*7 per cent, of geranyl-acetate if cal- 
 culated for that ester. 
 
42 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 A portion of the crude oil was rectified by steam. The 
 product was almost colourless and the odour good, whilst 
 but little residue remained. The oil thus rectified had 
 specific gravity at 15 C. = 0'9071 ; rotation a D = 
 + 12-1; refractive index at 22 C. =-- 1'4612. A deter- 
 mination of the eucalyptol by the resorcinol method gave 
 66 per cent, of that constituent in this rectified oil. 
 
 Although the specific gravity is a little low, and the 
 rotation a little high, yet the oil of this species may be 
 considered of fair value as a eucalyptol-pinene Eucalyptus 
 oil. 
 
 EUCALYPTUS VERNICOSA, Hook. f. 
 BOTANY. 
 
 Historical. This species was described in 1847 by J. D. 
 Hooker in " London Journal of Botany " (VI., p. 478) , 
 and the name has stood unchallenged ever since. 
 
 Remarks. Rodway suggests in his " Flora of Tas- 
 mania " (p. 58) that it is just possible this species is a 
 mountain form of K. Mu<l/rri, but we are of opinion that 
 technology at least wouid be better served if the two were 
 recognised as distinct species vide note under that species. 
 ' This species has the same form of leaves throughout its 
 life history, which K. Mitel/erf does not appear to have."- 
 L. G. Irby. 
 
 CHEMISTRY. 
 
 K&sent-inl Oil. This material for distillation was 
 obtained on the Hartz Mountains in May, 1912. It 
 reached Sydney in excellent condition. The average yield 
 of oil was 0'807 per cent. The crude oil was but little 
 coloured, and was rich in eucalyptol. It contained, how- 
 ever, rather a large amount of dextro-rotatory pinene, 
 consequently the specific gravity was somewhat low ; this 
 was also influenced by the remarkable freedom from high 
 boiling constituents, and no less than 96 per cent, of the 
 crude oil distilled below 194 C. The terpene phellan- 
 drene was quite absent in the oil of this species. 
 
 The crude oil had specific gravity at 15 C. ---- 0*9038; 
 rotation a D = + 11'3; refractive index at 18 C. 
 = 1'4651 ; and was soluble in 1 volume 80 per cent, alco- 
 hol, but not in 10 volumes 70 per cent. 
 
 On rectification, a small amount of acid water, and 
 rather a large amount of objectionable smelling aldehydes, 
 came over below 167 C. (corr.). Between 167-172 C. 32 
 
AND THEIR ESSENTIAL OILS. 43 
 
 per cent, distilled; and between 172-194 C. 63 per cent, 
 came over. These fractions gave the following: 
 
 Sp. Gr. at n Ata , Hef. Index 
 
 15 C. Dotation a D . a tl8C. 
 
 First traction 0-81)67 ... + 16'7 ... 1-4639 
 
 Second fraction .... 0-9086 ... + 9'4 ... 1-4640 
 
 The eucalyptol was determined by the resorcinol 
 method in the portion distilling below 194, and when 
 calculated for the crude oil 59 per cent, of that constituent 
 was shown to be present. 
 
 The saponification number for the esters and free acid 
 \vas 5'9. The oil of this species is thus one of the oils of 
 the eucalyptol-pinene group, which oils are found so fre- 
 quently occurring in the Eucalypts of a certain class. 
 
 The oil of this species and that of E '. Muelleri are very 
 closely related, in fact, almost identical in composition, 
 as can be seen by referring to the results for that species 
 recorded in this paper. 
 
 EUCALYPTUS VIMINALIS, Labill. 
 
 (" Manna Gum.") 
 
 BOTANY. 
 
 Historical. This species was originally named by Labil- 
 lardier from a Tasmanian tree, and has retained its specific 
 status ever since. 
 
 Remarks. This tree has also a very wide distribution 
 on the mainland, where the most common name is " Manna 
 Gum." 
 
 The material here examined corresponds with that from 
 trees growing on the mainland from which our original 
 determinations were made, and published in our work 
 " Eucalypts and Their Essential Oils " (p. 137). 
 
 The variety macrocarpa in Rodway's " Flora of Tas- 
 mania " (p. 57) we have determined as distinct, and 
 specifically described under the name of E. unialata. 
 
 At Alma Tier, Interlaken, are to be found trees growing 
 amongst E. Gun-mi, but different from that species, and 
 known locally as " White Gum" evidently considered 
 by settlers to have affinity with the " Manna Gum," E ' . 
 viminalis, but yet distinct from the " Cider Gum." 
 
 The " sucker " leaves are larger than those of E. 
 viminalis, and resemble those of E. Gunnii; then, again, 
 the normal ones are larger and broader than usually 
 obtain in K . viminalis t whilst the fruits favour the latter 
 species, as do also the timber and oil. 
 
44 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 It was probably this tree that gave Hooker grounds for 
 the statement in his " Flora Tasmaniae," under " E. 
 Gunnii " " sometimes, however, solitary trees may be 
 found of much greater size, and so like E. viminalis, that 
 without fruit it is impossible to distinguish it from an 
 Alpine form of that species." 
 
 Mr. L. G. Irby, when collecting in Tasmania, stated in 
 this connection that this form could always be distin- 
 guished from normal Gunnii in having longer leaves and 
 a pale or ashy-coloured bark agreeing with K. rhnintiHs. 
 whilst E. Gunnii has a blotched appearance. 
 
 CHEMISTRY. 
 
 Essential Oil. This material for distillation was 
 obtained at Hobart in April, 1912. It consisted of the 
 leaves and terminal branchlets, collected as would be done 
 for commercial purposes. The crude oil was of an olive- 
 brown colour, was fairly rich in eucalyptol, contained 
 pinene, and resembled in appearance and constitution the 
 oils of the pinene-eucalyptol group, with the exception 
 that a small amount of phellandrene was present. This 
 terpene appears to be a constant constituent in the oil of 
 K. viminalis, and helps to distinguish the normal form 
 from closely related species. A considerable quantity of 
 high boiling constituents was present, consisting largely 
 of the sesquiterpene. The oil is in consequence somewhat 
 insoluble in alcohol. The results obtained with the oil 
 agree most closely with those recorded in the " Research 
 on the Eucalypts " for E. viminalis of New South Wales, 
 showing the Tasmanian trees to be identical with those on 
 the mainland, and thus supporting botanical indications. 
 
 The average yield of oil was 0'741 per cent. The 
 specific gravity at 15 C. = 0'9154 ; rotation a,, = 
 + 4'2; refractive index at 19 = 1'4711; and was sol- 
 uble in 1 volume 80 per cent, alcohol. 
 
 On rectification, the usual amount of acid water and 
 objectionable volatile aldehydes came over below 167C. 
 (corr.), at which temperature the oil commenced to distil. 
 Between 167-173 22 per cent, distilled; between 173-194 
 54 per cent, distilled; and between 194-269 20 per cent, 
 (the greater portion above 255 C.). These fractions gave 
 the following results: 
 
 Sp. Gr. at Ref. Index 
 
 15C. Rotation a D ftt 190 
 
 First fraction 0-8969 ... +11-5 ... 1-4626 
 
 Second traction ... 0.9088 ... +3-4 ... 1-4629 
 Third fraction... 0-9308 ... +4-1 ... 1-4932 
 
AND THEIR ESSENTIAL OILS. 45 
 
 The rectified oil was yellowish in tint, resembling in 
 this respect the oil of E . globulus, K. goniocalyx, &c. 
 
 The amount of eucalyptol in the crude oil was 50 per 
 cent., determined by the resorcinol method in the portion 
 boiling below 194 C. The saponification number of the 
 esters and free acid was 9'5, which represents about 3 per 
 cent, of ester calculated as geranyl-acetate. 
 
 Material of the "White Gum" growing at Tnterlaken 
 was sent for distillation in August, 1912. The leaves and 
 terminal branchlets were, at this time, largely attacked 
 with a blight, and the trees were thus not healthy. The 
 yield of oil was less in amount than that from the Hobart 
 material, otherwise it agreed generally in characters and 
 constituents with the oil of this species. The phellan- 
 drene, however, was present in rather larger amount than 
 usual, and the eucalyptol somewhat less abundant. There 
 was a very strong resemblance between this oil and that 
 of E. viminalis from Moss Vale, New South Wales, 
 recorded in the " Research on the Eucalypts " (p. 138). 
 
 EUCALYPTUS DELEGATENSIS, R. T. B. 
 
 [SYN. : E. gigantea, Hook. f. (" Fl. Tas."), partim. 
 
 Not E. gigantea, Hook. f. (" Lond. Journ. Bot." 
 VI. 479. 1847). See remarks under E. 
 obliqua and E '. regnans, this paper.] 
 f" Gum-topped Stringy-bark." ) 
 BOTANY. 
 
 Historical. This tree was first collected in Tasmania 
 by Gunn (infra), but was first brought under the notice 
 of Australian botanists by Mr. T. Stephens, who forwarded 
 a specimen to Baron von Mueller, who named it for nina 
 E. haemastoma, Sm. ; and this was recorded in Proc. Roy 
 Soc. Tas. 1881 (p. 24). Under that species Mr. Maiden 
 goes pretty fully into the subject of the " Gum-topped 
 Stringy-barks " of Tasmania in the Proc. A.A.A.S. 1905 
 (p. 369 onward); also in his " Cr. Rev. Euc." or 
 E. obliqua (Pt. 2), and again in the Viet. Nat. XVIIL 
 (p. 127). The species recorded by him (loc. cit.) undei 
 E. virgata is this species. This particular " Gum-toppec 
 Stringy-bark " was, however, given specific rank undei 
 the name of E. Delegatensis, R. T. B. (Proc. Linn. Soc 
 N.S.W. 1900), from material obtained from Mt. Delegate 
 N.S.W., its Tasmanian habitat at the time not being 
 known to the author. 
 
46 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 Remarks. This is now the first definite record of this 
 tree as a species in Tasmania. 
 
 Hooker, in his " Flora Tasmania? " (1859), gives addi- 
 tional data to his original description of K. <jt<!<tf < / 
 (" Lond. Journ. of Bot." VI. 479. 1847)), and in this addi- 
 tional data he includes two other trees besides his original 
 "Stringy-bark" E. gigantea (K. obliqua). The one he 
 mentions under the name of " Stringy-bark Gum " (loc. 
 cit.) growing up to 4000 feet altitude is K. Ddegatensis. 
 
 E. obliqua and K. regnunx grow intermixed at lower 
 elevations, and these are what Hooker evidently refers to 
 in " Flora Tasmania " : " Specimens have been felled 
 in the valleys at the base of Mt. Wellington." Hooker's 
 description of K. gigantea in his classical work must there- 
 fore be regarded as a composite one, and this is well 
 brought out by Maiden in his " Critical Revision of the 
 Genus Eucalyptus " (Vol. I., p. 58), under " K. obliqua," 
 
 This species, K. Dclegatcntit, cannot be included under 
 E. gigantea, for that name belongs undoubtedly to K. 
 obliqua, as shown by the original description of Hookar 
 in his " London Journal of Botany " (1847), and later by 
 Bentham and Mueller. 
 
 Hooker, in his introduction to the genus (" Fl. Tas."), 
 speaks "of a possibility of his having confounded two 
 species in that work the ' Swamp Gum ' and ' Stringy- 
 bark ' under that species." These two are now known 
 as K . rrgnans and K. obliqua respectively the original of 
 his description in " London Journal of Botany " will cer- 
 tainly not match E. Drlrgnh-nxis, for it is not f/i* 
 " Stringy-bark colonorum " as stated by him. 
 
 Again, Hooker's remarks (" Fl. Tas."): "In some 
 varieties tin- //<>/i//t/ hranrln-x have a fine glaucous-pur /i! i 
 bloom in t/irff/, especially in Alpine localities; such is the 
 case with Mr. Gunn's No. 1095, from the banks of Lake 
 St. Clair, where it forms a forest on one side of the lake 
 only, to the exclusion of all other timbers "apply to this 
 species, and not his K . gigantea (E . obliqua), (" Lond. 
 Journ. Bot," 1847). 
 
 The material was first collected for the museum by Mr. 
 C. F. Laseron in 1908, on Mt. Wellington, where it is ? 
 very common tree, occurring chiefly above 2500 feet. This 
 altitude is interesting, as in the original locality from 
 which the species was described Delegate Mt. it occurs 
 at an elevation between 4000 and 5000 feet. 
 
 Mr. L. G. Irby, the museum collector, personally inter- 
 viewed Mr. Stephens, in order to ascertain exactly where 
 
AND THEIR ESSENTIAL OILS. 47 
 
 he could find the tree of the so-called E. haemastoma 
 (supra), in order that his material might be compared 
 with that upon which this investigation is based. This 
 " Gum-topped Stringy-bark " proved to be identical with 
 the material previously sent by Mr. Laseron, and also 
 with the Mountain Ash trees at Mt. Delegate, New South 
 Wales, upon which the specific name was bestowed. 
 
 Mr. Stephen's remarks (Pro. Roy. Soc. Tas. 1881, p. 
 24), viz.: "The chief peculiarity of this tree is, that 
 while the lower part of the butt is clothed with a thick 
 fibrous bark closely resembling that of the common ' Stringy- 
 bark ' (E. obliqua), the upper part and the smaller limbs 
 arid branches are quite smooth, whence its popular name. 
 The timber is highly prized by splitters, and, for generil 
 purposes, it is described by many competent authorities 
 as second only to the ' Blue Gum,' though opinions seem 
 to differ as to its durability." 
 
 It may thus be concluded, from the evidence adduced, 
 that the ' ' Gum-topped Stringy-bark ' ' of Tasmania grow- 
 ing at an altitude of about 2500 feet and above is this 
 species. The fruits vary somewhat in appearance, and 
 are not always uniform, even for the same tree, the flat- 
 topped or oval-topped rim of some forms being inter- 
 spersed with thin-rimmed, countersunk fruits. The chemi- 
 cal characters of the trees, however, appear to be con- 
 stant. 
 
 Whilst this investigation shows that the botanical and 
 chemical characters of the mainland and island trees cor- 
 respond, it may be mentioned en passant that it is the 
 species recorded by Rodway in the " Flora of Tasmania " 
 (p. 57) as E. haemastoma, from Mueller's naming. The 
 timber of this tree is used in Tasmania, and exported 
 under the name of " Tasmanian Oak." 
 
 The species is described and illustrated in Proc. Linn. 
 Soc. N.S.W., 1900 (p. 305 and Plate XVI.), and this 
 description again amplified in our work " Eucalypts and 
 Their Essential Oils " (p. 186), so need not be repeated 
 here. 
 
 E. haemastoma, Sm., as far as we have been able to 
 ascertain, does not occur in Tasmania. 
 
 Habitat. Mr. L. Rodway informs me E. Delegatensis 
 is common in North -Eastern Tasmania. It is thus widely 
 distributed in the island. 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species was collected in 
 July, 1908, at Mt. Wellington, at an altitude of about. 
 
48 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 2500 feet above sea-level. The principal constituents in 
 the oil of this species is phellandrene, and both eucalyptol 
 and pinene are practically absent. The peppermint con- 
 stituent was present in small amount. The results 
 obtained with the oil of this species from Tasmania are in 
 remarkable agreement with those of the oil of E '. Deltga- 
 tensis, from Delegate Mountain, Southern New South 
 Wales, collected in February, 1899 ; although the distance 
 separating these localities is very great. The difference in 
 the time of the year when the material was collected 
 naturally influences the physical characters somewhat, 
 because the principal terpene common to the oil of Euca- 
 lyptus species is usually present in greatest amount during 
 the early summer months. 
 
 The average yield of oil from leaves and terminal 
 branchlets was 1'88 per cent. The crude oil was of a 
 lemon-yellow colour. It had specific gravity at 15 C. 
 0*8664 : rotation a D = - 48'4 ; refractive index at 
 24 1-4828 ; and was insoluble in 10 volumes 80 per 
 cent, alcohol. The saponification numbei for ester and 
 free acid == 3*1. On rectification, the usual small amount 
 of acid water and volatile aldehydes came over below 172 
 C. (corr.), at which temperature the oil commenced to 
 distil. Between 172-183 C. 65 per cent, distilled; 
 between 183-234 12 per cent.; and between 234-270 16 
 per cent. These fractions gave the following results: 
 
 Pntl Sp. Gr. at Ref. Imi.-x 
 
 n * D - 15 C. at 24 C. 
 
 First fraction 54'2 ... 0-8532 ... 1-4777 
 
 Sfcond fraction ... 35-6 ... 0-8764 ... 1-4812 
 Third fraction ... 0-9004 ... 1-4914 
 
 The low specific gravity of the high boiling constituents 
 of the oil of this species is remarkable and most unusual. 
 The original results with the oil of this species were pub 
 lished in our work " Research on the Eucalypts " (p. 187V 
 That they are in agreement with those of the oil from the 
 Tasmanian trees is shown from the following tabulate 
 results : 
 
 Oil of E. Dtlegatcmi*. Oil if K. Deli-gat en * 
 (Mt. Wellington. (Mt. Delegate, 
 
 Tas., 1908.) N.S.W., 1809.) 
 
 Yield of oil l-88percent. 1 76 per cent. 
 
 Colour of crude oil Lemon-yellow Lemon-yellow 
 
 Phellandrene Abundant Abundant 
 
 Eucalyptol Practically absent Practically absent 
 
 Piperitone Present in small Present in small 
 
 amount amount 
 
AND THEIR ESSENTIAL OILS. 49 
 
 Oil of E. Delvgattwiix. Oil of E. Delegatnusis. 
 
 (Mt. Wellington, (Mt.' Delegate. 
 
 Tas., 1908.) N.S.W., 1891).) 
 Specific gravity ; crude oil 
 
 at!5 C 1 0-8664 0-8602 
 
 Rotation a D ditto 48-4 58'6 
 
 Refractire index at '24 .... 1-4828 At 16 = 1-4881 
 
 S. N . ester and free acid .... 3-1 3-5 
 
 Insoluble In 10 vols. 80/ In 10 voK 80/ 
 
 alcohol alcohol 
 -Specificg ravity, first trac- 
 tion at 15 0-8532 0-8513 
 
 Ditto, second fraction 0-8764 0'8712 
 
 Ditto, third fraction ... 0-9004 0-9017 
 
 It is thus seen that the characteristic features of the 
 one oil are also shown with the other, and as the botanical 
 results are also in agreement it is evident that this tree is 
 common to both Tasmania and the mainland. 
 
 Material of the " Gum-topped Stringy-bark " for dis- 
 tillation was collected at Strickland in August, 1912. The 
 oil was found to agree in all respects with that of E, 
 DeJegatenai* from Mt. Wellington and from New South 
 Wales. It contained the same constituents, practically 
 the same amounts, and the physical characters of the oil 
 agreed most closely. The specific gravity at 15 0'8596 ; 
 rotation a D - - 47'4 ; refractive index at 17 =* 1'4826, 
 Hiid was insoluble in 10 volumes 80 per cent, alcohol. The 
 saponification number of ester and free acid was 3'2. The 
 yield of oil was 1*3 per cent., which is somewhat less than 
 is usual with this species ; but the time of the year is most 
 probably answerable for this. 
 
 Material of the " Gum-topped Stringy-bark " growing 
 at Lake Sorell was sent for distillation in August, 1912. 
 The trees were those originally mentioned by Mr. Stephens 
 as growing at this locality. These trees are Eucalyptus 
 Dele gate?) sis, and the oil agreed in all respects with that 
 from the " Gum-topped Stringy-bark " at Strickland, 
 also from the same species growing at Mt. Wellington, 
 and also that from the New South Wales trees of this 
 species. It contained the same constituents and in prac- 
 tically the same amounts, and the physical characters 
 agreed most closely. The specific gravity of the crude oil 
 at 15 C. == 0-8676; rotation a^ = - 47'7 ; refractive 
 index at 20 = 1'4819 ; and was insoluble in 10 volumes 
 80 per cent, alcohol. The comparative constancy in the 
 characters of the oil of this Eucalyptus species is, from 
 these results, shown conclusively. 
 
50 A RESEARCH ON THE EUCALYPT8 OF TASMANIA 
 
 EUCALYPTUS OBLIQUA, L'Her. 
 
 [SYN. : E. gigantea, Hook. f. (" Lond. Journ. Bot." 
 
 VI. 479. 1847), and 
 E. gigantea, Hook. f. (" Fl. Tas." 1859), partim.} 
 
 ("Stringy-bark.") 
 BOTANY. 
 
 Historical. This was the first species of the genus 
 described, the author being L'Heritier, who recorded it in 
 1788 in " Sertum Anglicum " (18, t. 20). 
 
 Hooker redescribed it under the name of E. gigantea 
 (" Lond. Journ. Bot." VI. 479. 1847). 
 
 Bentham, in his " Flora Australiensis " (Vol. III., p. 
 204), acknowledged its specific rank, whilst placing under 
 it as synonyms E. gigantea, Hook. f. E. falcifolia,, Miq., 
 and E. nrri'n* t i< F. v*. M. (1866). 
 
 Mueller also describes and figures it in his " Eucalypto- 
 graphia " (Dec. III. 1879). 
 
 Remarks. Hooker, when he described his species of 
 E. gigantea in the " London Journal of Botany " (VI. 
 479. 1847), was unaware that L'Heritier had described 
 the species under the name of E. ot>/i(/un, as his (Hooker's) 
 description (loc. cit.) applies in every detail to this 
 species, for it is indeed " the Stringy-bark colonorum, 
 and abundant throughout Tasmania," as stated by him, 
 and is to-day the " Stringy-bark " of the island. 
 
 When writing his "Flora Tasmania " (1859), Hooker, 
 having, in addition to his own, Gunn's and other collec- 
 tors' material to work upon, included two other trees 
 under his original name in his classical work. One grow- 
 ing intermixed with E. obliqua has since been separated 
 by Mueller under the name of E. regnans, and the other, 
 growing at 4000 feet elevation, known as " Stringy-bark 
 Gum " or " Gum-topped Stringy-bark," was described 
 by one of us in Proc. Linn. Soc. N.S.W. in 1900, under 
 the name of E. Delegatensis. 
 
 These three trees occur at different altitudes, and the 
 respective species in the above order can be traced in 
 Hooker's two descriptions (loc. cit). Hooker's reference 
 that " trees are felled in the valleys at the foot of Mt. 
 Wellington," in his " Flora Tasmania," evidently refers 
 to this species and E ' . reg-nans, for they only occur on the 
 lower elevations there the tree of the higher altitudes is 
 E. Delegatensis in the same quotation. 
 
AND THEIR ESSENTIAL OILS. 51 
 
 [ri this connection the following remarks of Hooker 
 in his "Flora Tasmania " (p. 132) are interesting: 
 " In the Proceedings of the Royal Society of Tasmania I 
 find some very valuable notices respecting the Blue Gum, 
 Swamp Gum, Stringy Bark, Peppermint Gum, Myrtle- 
 leaved Gum, Ash Gum, Ironwood, Mountain Gum, Weep- 
 ing Gum, Black-butt Gum, and White Gum. The Swamp 
 Gum and Stringy-bark are perhaps both referable to my 
 ft. gigantea, under which two species may be confounded 
 by me, or the Swamp Gum may be some other species 
 attaining a gigantic size in damp hollows. Mr. Mitchell 
 describes the Swamp Gum as so very like the E. globulus 
 as not to be easily distinguished, but with smaller leaves 
 and thinner bark, as being the largest of the genus, and 
 growing twice as fast as ft . glob id as ; he mentions trees 
 250 feet to the first branch. The Stringy-bark he dis- 
 tinguishes by its much thicker, fibrous bark; Mr. Milligan, 
 however, adds in a note that this Stringy-bark is the most 
 gigantic of all, that it is well named gigantta by me, and 
 that he has measured a sound trunk 64 feet in girth at 4 
 feet above the ground, arid 200 feet high to where it was 
 broken off, and containing 200 tons of timber." 
 
 Here we see that Hooker suspects that he has con- 
 founded two species under his E . gigantea of that particu- 
 lar work, and indeed he really has, for the " Swamp 
 Gum " is known as E '. regnans, and " Stringy-bark " (E. 
 gigantea) as the true E. obliqua; but he has even gone 
 further, and included by slight references E . Delegatensis 
 (Gunti's specimens). 
 
 His figure (loc. cit.) might pass for any of these three. 
 
 Hooker's common name of " Stringy-bark " in the " Lon- 
 don Journal of Botany " must refer to E. obliqua, for that 
 is practically the only true " Stringy-bark " in Tasmania. 
 
 Baron von Mueller, who certainly gave the subject seri- 
 ous study, correctly places Hooker's E. gigantea under 
 E ' . obliqua in his " Eucalyptographia," and, like Hooker, 
 refers to it as the Stringy-bark tree of Tasmania. 
 
 Hooker's description of E . gigantta (" London Journal 
 of Botany ") faithfully describes E '. obliqua, whilst his 
 description in " Flora Tasmaniae " is certainly a compo- 
 site one. 
 
 It is a well-marked species, with a wide geographical 
 range, and is quite constant in specific and chemical char- 
 acter, whether found in Northern New South Wales on 
 the mainland, or in Tasmania, where it is the most com- 
 mon " Stringy-bark." 
 
52 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 It is easy of recognition both in the field and herbarium. 
 
 The timber is characteristic, and is closely related to tUe 
 " Gum-topped Stringy-barks " of Tasmania, E. Delegaten- 
 >/.s and K '. rryuanx, but the sapwood is very liable to the 
 attacks of borers, which is not so in the case of E . Dele- 
 gat ensis. 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species was collected 
 in July, 1908, at Mt. Wellington, at an altitude of about 
 2000 feet; and also at about the same time of the year 
 at Williams ford, on the West Coast of Tasmania. Both 
 the crude oils were of a reddish-brown colour, due to the 
 iron of the still, and both contained the same constituents, 
 and thus were similar in all characters. The results also 
 agreed with those obtained with the oil of this species 
 from Monga, New South Wales, collected in 1898, an- 1 
 published in our work " Research on the Eucalypts " 
 (p. 188). The chief constituent of this oil is phellandrene, 
 and the high boiling aromatic aldehyde (aromadendral) 
 occurs in SOIIH (juantity. Eucalyptol is present in very 
 small amount. Both eudesmol and piperitone are absent. 
 The following are the tabulated results for the crude 
 oils from the two localities: 
 
 Mt. Wellington. Williainsfonl. 
 
 Yield of oil 0*66 ]>T n-iit. 0*66 JHT cent. 
 
 Phellandrene Abundant Abundant 
 
 Aromadendral Pronounced Pronounced 
 
 Specific gravity at 15 C .. 0-8836 0-8854 
 
 Rotation a D -28-1 -24-2 
 
 Refractive index at 24 .... 1 4852 1 4843 
 
 Soluble In 3 vols. 80/ In 4 vols. 80/ 
 
 alcohol alcohol 
 
 S.N. ester and free acid.... 8'1 7-2 
 
 These results, together with the botanical characters, 
 indicate that the Tasmanian trees of this species are identi- 
 cal with those of New South Wales and Victoria. 
 
 In August, 1912, leaves for distillation were collected 
 by Mr. Irby from doubtful trees, which, although growing 
 amongst E. nhliqua on Mt. Wellington at an altitude of 
 about 1000 feet, had a smooth top, the "stringy-bark" 
 only reaching to the branches. The oil distilled from this 
 material was identical in all respects with that of the 
 typical E. obliqua. The yield of oil was 0'768 per cent. ; 
 specific gravity of crude oil at 15 C. 0'8845 ; rota- 
 
 tion a D = -28'8; refractive index at 19 = 1'4839, and 
 
AND THEIR ESSENTIAL OILS. 
 
 was soluble in 3 volumes 80 per cent, alcohol. The pres- 
 ence of aromadendral and absence of piperitone in the oil 
 of E . obliqua is a distinguishing feature, and enables these 
 trees to be easily separated from all allied forms growing 
 in Tasmania. 
 
 EUCALYPTUS RODWAYI (nobis). 
 ("Apple-scented Gum" or "Black Gum.") 
 (Plate II.) 
 BOTANY. 
 
 Historical. This species was introduced to the scientific 
 world by Mr. J. H. Maiden , who recorded it in Proc. Roy. 
 Soc. Tas. 1902 (p. 83) under the name of K. Macarthuri, 
 as he considered it to be identical with the New South 
 Wales tree of that name, his attention having been drawn 
 to it by Mr. R. II. Cambage, F.L.S., who first saw it at 
 Deloraine. 
 
 Re-marks. It was hoped when this research was under- 
 taken that this species would be found to be the true K . 
 Macarthuri, on account of the valuable oil yielded by that 
 species, but the investigation has proved otherwise. The 
 species is now fully described here, and is dedicated to 
 Mr. L. Rodway, Government Botanist of Tasmania, who 
 has laboured so long and done so much for botanical 
 research in the island State. 
 
 The " sucker " leaves are quite distinct from those of 
 E. Macarthuri, whilst the fruits, normal leaves, and buds 
 are, as a rule, smaller. It differs also from that species 
 in the nature of the bark and timber, as well as chemical 
 constituents of the oil. 
 
 In a botanical sequence it might be placed in the 
 Hemiphloise group of Eucalypts. 
 
 It is a valuable addition to the timber industry of Tas- 
 mania. 
 
 Systematic Description. A large forest tree, specimens 
 4 feet in diameter being common. Bark more like the Box 
 barks than any other cortical section of the Eucalypts, 
 and persistent on the stem and branches. " Sucker " 
 leaves under 3 inches long and about J-inch broad, oval- 
 lanceolate to ovate-lanceolate inclined slightly to falcate, 
 petiolate, alternate, almost membraneous, same shade of 
 green on both sides, venation not well pronounced, later il 
 veins distinctly cbliq'w "*t the base and less so upwards 
 towards the aper 
 
54 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 Normal leaves petiolate, lanceolate, sometimes falcate up 
 to 6 inches long, but mostly less than 4 inches, rarely 
 1 inch wide, mostly about ^-inch wide, rather thicker 
 than the " sucker " leaves. Venation not specially pro- 
 minent, lateral veins oblique, intramarginal vein slightly 
 removed from the e Ige. Peduncles axillary, about J-inch 
 long, bearing generally under six small flowers, calyx 'n 
 bud 1 inch long, operculum equal in length, conical 
 acuminate. 
 
 Fruit hemispherical to slightly pyriform, 2 lines in 
 diameter, rim convex, valves slightly exserted. 
 
 Arbor altitudinem saltern 150' attenens, 4' 
 diemente. Cortex trunco ramisque persistens ; 
 cortex trunci similis Eucalyptis " Box." Folia 
 numerosa, ovata v. lanceolate v. falcata, leviter 
 alternata, petiolata, 3"-4" longa, infra 1 , 
 lata; vena non clara, obliqua, pauca, longitud- 
 ina dua leviter a margine remota. Peduncu- 
 lus 3-7 floribus. Pedicellus paene 2" longus ; 
 calyx pyriformis ; operculum non calycem 
 excedente, semiglobulosum in rostrum fere 
 conicum, acuminatum. Capsula hemispherica, 
 2'" lata. Species loco natali " Black Gum " 
 vocatur. 
 
 . Deloraine (R. II. Cambage, F.L.S.). Between 
 Interlaken and Tunbridge, about 3000 feet, and drops 
 down the western slopes to quite a low altitude ; also 
 Strickland (L. G. Irby). 
 
 Timber. The heartwood is very pale pinky in colour 
 to almost white, with quite an ash appearance and texture. 
 It dresses well with a pleasing sheen, is not heavy, but 
 fairly hard, fissile, and close-grained. It should prove a 
 splendid substitute for imported Ashes, being quite equal 
 to any Australian Eucalyptus classified as Ash by the local 
 timber world. It is a distinct and important addition io 
 Tasmanian timbers, and might commercially be called 
 " Tasmanian Ash." 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species for distillation 
 was collected at Deloraine in June, 1912. Leaves with 
 terminal branchlets were utilised as would be done for 
 commercial purposes. The crude oil when cleared was light 
 olive-brown in colour, and had a terpene odour, together 
 with that of eucalyptol, but with no resemblance to 
 
AND THEIR ESSENTIAL OILS. 5t> 
 
 geranyl-acetate. It contained pinene as the chief terpene^ 
 and phellandrene could not be detected in it. It 
 was rich in eucalyptol, over 60 per cent, of the crude oil 
 being that constituent. The saponification number for 
 the esters and free acid was only 3'96, representing 1'3& 
 per cent, of ester if calculated entirely as geranyl-acetate. 
 The amount of ester in the oil of this species is thus very 
 small. The average yield of oil was 0'482 per cent. a 
 comparatively small one for a commercial oil. 
 
 The crude oil had specific gravity at 15 C. = 0'9075; 
 rotation a D = + 10'6; refractive index at 24 = = 1'4653; 
 and was soluble in 6 volumes 70 per cent, alcohol. 
 
 On rectification, the usual amount of acid water and 
 volatile aldehydes were obtained below 164 C. (corr.), at 
 which temperature the oil commenced to distil. Between 
 164-173 33 per cent, distilled; between 173-198 57 per 
 cent.; between 198-265 5 per cent, distilled. The high 
 boiling fraction contained a constituent with rotation ta 
 the right, but it was not isolated. The following res aits- 
 were obtained with the several fractions : 
 
 Sp. Gr. at Ref. Index 
 
 160 C . Rotation a D . a( . 
 
 First traction ...... 0-8979 ... 4-15-8 ... 1*4629 
 
 Second tracti on... 0-9119 ... +8-4 ... 1-4038- 
 
 Third fraction ...... 0'9231 ... + 5'2 ... 1*4805 
 
 The eucalyptol was determined by the resorcinol method 
 in that portion of the oil distilling below 198 C. and cal- 
 culated for the crude oil, which was shown to contain 64 
 per cent, of that constituent. The rectified oil had a yel- 
 lowish tinge, a peculiarity often found with the eucalyptol- 
 pinene oils distilled from the leaves of the smooth-baik 
 Gums like E. globtduj, E. goniocalyx, &c. Pinene was. 
 isolated from the first fraction, and proved to be that sub- 
 stance by the formation of the nitrosochloride, which 
 melted at the correct temperature. 
 
 The oil from the leaves of E. Macarthuri of New South 
 Wales appears never to contain less than 60 per cent, of 
 geranyl-acetate at any time, this ester often rising to 75 
 per cent., and one determination of the oil from the 
 '* suckers " showed that it contained over 77 per cent, of 
 geranyl-acetate. Eucalyptol does not appear to occur 
 in the oil of E. Macarthuri, although pinene is usually 
 present in small amount. 
 
56 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 EUCALYPTUS VIRGATA, Sieb. 
 
 C' Ironbark." J 
 
 BOTANY. 
 
 Historical. This is the first published record of this 
 tree in Tasmania, although it was originally described by 
 Sieber in 1827, from New South Wales material. 
 
 It is the same tree as described by us in e< Eucalypts 
 and Essential Oils " (1902), under " E. virtjatti^' which 
 was placed by Bentham in his " Flora Australiensis " 
 (1886, Vol. III.) with E. Sieberiana, who of course had to 
 work on herbarium material alone. 
 
 Remarks. Up to the present time this tree has gener- 
 ally been regarded as E. Sieberiana by botanists working 
 on the Tasmanian flora. Its correct systematic position, 
 however, was latterly suspected by us, for under E. Sie- 
 berianti (Proc. A.A.A.S. 1902, p. 372), by J. If. Maidm, 
 occurs this statement: "I give the following Tasmanian 
 locality for this species as far as I have examined authen- 
 tic specimens: 'Ironbark,' George's Bay, August, 1878, 
 Augustus Simson (comm. W. W. Spicer). With shiny 
 fruits. First labelled E. virgata, Sieb., and then K . Sir- 
 Jnr'uinn, F. v. M., by Mueller." 
 
 From this it appears that Mueller must have associated 
 these two trees as morphologically very close, thus follow- 
 ing the determinations of Bentham in his " Flora Aus- 
 traliensis" (Vol. III., p. 202). 
 
 In this connection the following remarks in our work on 
 " Eucalypts and Essential Oils " are interesting :- 
 
 11 Much has been written recently in regard to the identi- 
 fication of Sieber's tree (vide Proc. Linn. Soc. N.S.W. 
 1896-1900). 
 
 " From Sieber's specific name there can be little doubt 
 but that he intended his description to apply to a small 
 twiggy Eucalyptus, with exactly the same morphological 
 characters (as later researches have shown) as the present 
 ' Mountain Ash ' (E '. Sieberiana, F. v. M.), and these 
 characteristics of the two species are proved by Bentham '-a 
 note (' B. Fl.' TIT., p. 202), for under 1 E. ' virgata ' he 
 states: 'I have described this species chiefly from Old- 
 field's, Woolls', and F. Mueller's specimens; Sieber's 
 appear to be the same, but they are only in young bud, 
 and therefore uncertain.' 
 
 " There is on the Blue Mountains a dwarf Eucalyptus, or 
 ' Mallee,' the herbarium material of which cannot be 
 separated from that of the tall tree E '. Sieberiana but 
 the chemical constituents of each are quite different. 
 
AND THEIR ESSENTIAL OILS. 57 
 
 " It is very probable that Oldfield's, Woolls', and Muel- 
 ler's specimens belong to the tall tree, known as ' Moun- 
 tain Ash,' and since named by Mueller as E. Sieberiana, 
 whilst Sieber's specimens no doubt belong to the 
 dwarf tree or ' Mallee,' and, as Bentham found, quite 
 impossible of separation in dried material. If this is 
 correct, then Sieber's tree only differs in field and chemi- 
 cal characters, and on these we accept Sieber's name for 
 the mountain shrub which has identical morphological 
 characters with E ' . Sitbtrtana, F. v. M." 
 
 Deane and Maiden at first (Proc. Linn. Soc. N.S.W., 1897, 
 p. 719) were inclined to regard it as a glabrous form of K. 
 LuehtLanniana or a pointed operculum form oi K oh iu*i flora, 
 and to speak as definitely as possible define it as a 
 glabrous form of E. Lucltmannuina. Later, however 
 (Proc. A.A.A.S. 1902, Hobart), and in 1907 " Cr. Rev. 
 G. Eu." (Vol. I., p. 273), Maiden restores the name 
 E. virgatd, Sieb., placing under it E. obtusi flora, D C., 
 and E. xtric.ta, Sieb., which are arranged by Bentham in 
 his <4 Flora Australiensis " in the following order, 3, 9, 
 and 32, of his systematic classification of the Eucalypts, 
 thus showing that he regarded the material he examined of 
 the three as quite distinct. It seems hardly likely either 
 that Sieber, having himself collected his two species in the 
 field, should have given separate names to one and the 
 same tree, for he was thus able to speak from actual 
 acquaintance with their field characters, an experience 
 that is invaluable as regards a knowledge of the Eucalypts. 
 
 The discovery, or rather the identification botanicaDy 
 and chemically, of this tree with the mainland one is of 
 scientific interest, for whereas the latter, as far as known, 
 is only a " Mallee " on the Blue Mountains in New South 
 Wales, in Tasmania it is a medium-sized tree. 
 
 Mueller, in his " Eucalyptographia " (Dec. 11), under 
 " E. Sieberiana," states: "The specific appellation now 
 offered is also a new one, inasmuch as the original adjec- 
 tive ' virgata ' is very misleading, because only under very 
 exceptional circumstances is this usually tall timber-tree 
 reduced to a virgate or twiggy state; neither is there any- 
 thing streaked or striped about the stem to justify the 
 designation ' virgate ' in any other sense of the word." 
 
 It would appear now, in view of our increased know- 
 ledge, that the name is very appropriate, for the Blue 
 Mountain specimens are all " twiggy or virgate," and the 
 bark of the Tasmanian tree is " streaked or striped," for 
 the hard compact bark runs down in streaks or ridges. 
 
08 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 It is quite possible, in fact highly probable, that this 
 tree occurs farther south than recorded for New South 
 Wales, and also in Victoria, for it is easy enough to con- 
 found it with K . SieberidiKi. 
 
 It appears that the name " E. Sie.beriana " must now 
 be deleted from the flora of Tasmania. 
 
 An amended description of the original, by Sjeber (D C. 
 Prod. III., p. 217), is here given, by the addition of 
 mature fruits, timber, and bark. 
 
 tiysttrruitic Description. An average forest tree, attain- 
 ing over 100 feet (Rodway), branchlets glaucous. Bark 
 thick, laminated, running down in ridges, friable but no 
 kino on outer portion, inner portion hard, close, compact, 
 in cross-section, the duramen difficult to determine from 
 the normal wood, inner portion fibrous longitudinally. 
 "Sucker" leaves mostly alternate, petiolate, sometimes 
 glaucous, thin, oval-lanceolate to lanceolate, acuminate, 
 venation distinctly marked, lateral veins not very oblique, 
 intramarginal veins removed from the edge, 4 to 5 inches 
 long, up to 1 inch broad. Normal leaves comparatively 
 small, rarely 5 inches long, mostly from 2 to 4 inches long, 
 up to -inch broad, lanceolate, shining, subcoriaceous. 
 Venation inconspicuous, lateral veins well oblique, a few 
 running from the petiole intramarginal vein removed from 
 the edge. Flowers on axillary peduncles or in short 
 panicles, operculum hemispherical, shortly acuminate. 
 
 Fruits pyriform without pedicel, i-inch long, J-inch in 
 diameter, contracted at the top, rim countersunk. 
 
 The differences between E. virgata, Sieb., and /:'. 8ie- 
 IK r'hiim are found principally in the smaller leaves, counter- 
 sunk rim of the smaller fruits, timber and chemical con- 
 stituents of the oil of the former. They are rather diffi- 
 cult to separate, in herbarium material alone. 
 
 Timltrr. This is known in the trade as " Tasmanian 
 Ironbark," but this is not a good name, for it falls below 
 the qualities of the mainland Ironbarks. The presence of 
 gum veins detracts from it to a certain degree, but other- 
 wise it is a close-grained, hard, fairly heavy timber, with 
 an oak colour. It requires careful seasoning. 
 
 CHEMISTRY. 
 
 Kxxrnt'ml Oil. This material for distillation was 
 obtained at St. Marys in June, 1912. The average yield 
 of oil from the leaves with terminal branchlets was 0'793 
 per cent. The crude oil was but little coloured, it being 
 of a light yellowish-brown tint. It had a slight second- 
 
AND THEIR ESSENTIAL OILS. 59 
 
 ary odour of peppermint, due to the- presence of a small 
 amount of piperitone, and eucalyptol could also be readily 
 detected: The principal constituent in the oil of this 
 species is phellandrene, and pinene is probably absent. 
 Eudesmol was present in some quantity, the high boiling 
 fraction becoming solid in the bottle after a few hours. 
 Only a very small amount of ester was determined. 
 Although the phellandrene shows the laevo-rotatory modifi- 
 cation to be in excess, yet, judging from the comparatively 
 small rotation, and the almost entire absence of pinene, 
 it is possible that the phellandrene of opposite rotation 
 may be present also. So far dextro-rotatory phellandrene 
 has not been isolated from Eucalyptus oil. The crude oil 
 had specific gravity at 15 C. O8883 ; rotation 
 
 H D = -20'9; refractive index at 18 = 1'4819; and was 
 soluble in 3 volumes 80 per cent, alcohol. This compara- 
 tively ready solubility is due to the eucalyptol and the 
 eudesmol. 
 
 On rectification, the usual amount of acid water 
 and volatile aldehydes were obtained below 173 C. 
 (corr.) ; the aldehydes, however, were much less 
 pungent and objectionable than those from the 
 oils of the pinene-eucalyptol group. Between 173-198 C. 
 78 per cent, distilled; the temperature then rose 
 quickly to 265, only 1 c.c. distilling ; between 
 265-282 17 per cent, distilled. These fractions gave the 
 following results: 
 
 Sp. Qp. at Ref. Index 
 
 15 C. Rotation a D . M ^ c 
 
 First traction 0*8713 ... -29'5 ... 1-4782 
 
 Second traction 
 
 (2^5-282) 0-9421 ... ... 1-5048 
 
 The eucalyptol was determined in the first fraction by the 
 resorcinol method and calculated for the crude oil, which 
 was thus shown to contain 21 per cent, of that constituent. 
 The saponification number of the ester and free acid was 
 only 3'3. The oil of this species has a strong resemblance 
 to that of the E. v'u-yutn originally investigated at this 
 museum, and recorded in the " Research on the Euca- 
 lypts " (p. 194). The large amount of eudesmol causes 
 the high boiling fraction to soon become solid ; and this 
 appears to be a distinguishing feature with the oil of 
 K. viryata, because the oil of E. Sieberiana did not con- 
 tain eudesmol in the samples tested. The presence of the 
 eucalyptol in the oil of K. virgata also distinguishes it 
 from that of E . Sieberiana. 
 
60 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 EUCALYPTUS TAEN1OLA (gp. nov.). 
 (Plate III.) 
 
 Historical. This appears to be the first actual scientific 
 record of this Eucalyptus. 
 
 Remarks. The specimens upon which this species is 
 founded were obtained by Mr. L. G. Irby at St. Mary's 
 Pass, Tasmania, where it was found growing amongst trees 
 of K. riryata, and E. amiigdalimi , LabilL, and from 
 which he states the species is easily differentiated in the 
 field from its congeners. The bark is finer-checked than 
 E. rirgata, running more closely to the " Peppermint " 
 bark in texture than the latter species. 
 
 The leaves, both " sucker " and normal, are much nar 
 rower than those of K. rir<j<it<i, and of a different appear- 
 ance altogether. They are long and linear, varying greatly 
 in length on the same tree, being from 4 to 11 inches 
 long 7 to 8 inches long being common. It is on the rib- 
 bony appearance of the leaves that the specific name is 
 founded. 
 
 The fruits, however, are almost identical with those of 
 E. rtrf/ftta, and yet the general appearance of the tree is 
 more like that of K. amygdalnm (L. G. Irbv). 
 
 Si/xfrttnifir Description. A tree about 40 to 50 feet 
 high, and 2 feet in diameter, with a " Peppermint " bark. 
 " Sucker " leaves linear, lanceolate, straight, 4 to 6 inches 
 long, ^-inch wide, opposite or alternate. Normal leaves 
 narrow linear to linear, lanceolate, up to nearly 1 foot 
 long, thin, venation not pronounced, but best seen in 
 larger leaves, lateral veins very oblique, intramarginal 
 vein removed from the edge. Peduncles axillary, but 
 (through the falling off of the leaves) the infloresence 
 sometimes appears paniculate. Flowers few in the head. 
 Calyx pyriform ; operculum small, compressed, slightly 
 pointed. 
 
 Fruits pear-shaped, ^-inch long and J-inch wide, taper- 
 ing into a short pedicel, rim countersunk, valves not 
 exserted . 
 
 Arbor medoicra, attitudinem 40-50' attinens ; 
 ramusculi teretes, graciles. Cortex trunci in 
 laminis duris, similiter " Peppermint " generis. 
 Folia alternata, semi-coriacea, angusta lanceo- 
 lata v. lineata (taeniola) 12" longa J" lata ; 
 venis parum insignis acutis obhquis, vena 
 peripherica a folii margine conspicue remora. 
 Pedunoulis axillaris, solitariis 5-9 floris pedi- 
 
AND THEIR ESSENTIAL OILS. 61 
 
 cellis vix ullis. Calyx turbinatis, operculura 
 hemisphericum v. conicum. 
 
 Fructus turbinatus, margo contracto, con- 
 cavo J" longa, J" lata, valvae prorsus inclusae. 
 
 CHEMISTRY. 
 
 Kssential Oil . The material of this form for distillation 
 was collected at St. Marys in June, 1912. The average 
 yield of oil was 0'657. The crude oil was little coloured, 
 of a terpene odour, and contained much phellandrene, 
 scarcely any pinene, and a very small amount of eucalyp- 
 tol. Eudesmol was detected in it. The oil belongs to 
 the " Peppermint " group, as it contained a small amount 
 of piperitone, and a considerable quantity of high boiling 
 constituents was also present. The yield of oil was small, 
 and for this and other reasons can have little commercial 
 value. The principal constituent in the high boiling frac- 
 tion appeared to be the sesquiterpene. 
 
 The specific gravity of the crude oil at 15 C. = 0'8864 ; 
 rotation a D = -27'6; refractive index at 17 = 1'4872, 
 and was soluble in 5 volumes 80 per cent, alcohol. The 
 saponification number for the esters and free acid was only 
 
 3-0 
 <o 
 
 On rectification, a few drops of acid water, and a little 
 volatile aldehydes of a not unpleasant odour, came over 
 below 173 C. (corr.). Between 172-198 68 per cent, 
 distilled; between 198-265 only 1 c.c. came over; and 
 between 265-282 26 per cent, distilled. These fractions 
 gave the following results: 
 
 Sp. Gr at Ref. Index 
 
 P loo C . Rotation a o ^ 1?0 
 
 First fraction 0-8592 ... 45-1 ... 1-4808 
 
 Second fraction 0-9408 ...Dextro-rotatory... 1-5029 
 (265-282) 8 to 10, hut 
 
 light did not 
 
 pa-s well 
 
 The eucalyptol was determined by the resorcinol method 
 in the portion distilling below 198, and gave a result 
 equal to 7 per cent, of that constituent in the crude oil. 
 
 These results indicate that this form is somewhat closely 
 associated with the Tasmaniaii E. rircjata. The oil from 
 the latter, however, contained more eucalyptol and more 
 eudesmol, while that of K. taeniola had more phellandrene, 
 as indicated by the rotation figures. 
 
62 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 EUCALYPTUS AMYGDALINA, Labill. 
 
 BOTANY. 
 
 Historical. This Eucalyptus was described by Labil- 
 lardier in his " Plants of New Holland " (1806). 
 
 Re marks. This name, E. ant iujdalimi, has 'almost since 
 the beginning of Eucalyptology been associated with the 
 Tasmanian flora, for it was from Van Diemen's Land that 
 Labillardier obtained his specimens. It is, however, with 
 much reluctance that we announce that we have failed to 
 find this tree on the mainland of Australia. 
 
 The tree passing as E . nintjyilal'ina in the Eastern States 
 is of medium size with a " Peppermint " bark, opposite, 
 sessile, cordate-lanceolate " sucker " leaves, medium-sized 
 lanceolate normal leaves, small hemispherical fruits with a 
 truncate or depressed rim, and the leaves yielding a par- 
 ticular oil. 
 
 As far as our researches go, trees having these character- 
 istics do not appear to occur in Tasmania, where the name 
 was originally ascribed to this species. Thus the trees 
 going under the name of /:'. <iinii<i(ltilina in Tasmania and 
 E. amygdalina in Victoria and New South Wales are not 
 the same. 
 
 As, however, the name has become so interwoven with 
 the Eucalyptus literature of Victoria and New South 
 Wales in connection with the economics of the tree found 
 there, it is now almost next to impossible to supersede the 
 name of the tree of the Eastern States, or at least without 
 adding to the already long nomenclature of the genus. 
 
 That the latter is not Labillardier's tree we are firmly 
 convinced, and on the following grounds: 
 
 (1) The plate of E. <un ij<i<l<ilmu of Labillardier in 
 
 his " Plants of New Holland " depicts the 
 Tasmanian Eucalypt, and certainly not the 
 mainland one. 
 
 (2) The " sucker " leaves of the former are petio- 
 
 late, alternate, and the latter opposite, ses- 
 sile, cordate, obtuse. 
 
 (3) The normal leaves of the former are smaller 
 
 and narrower. 
 
 <4) The fruits of the Tasmanian tree are practi- 
 cally identical in shape with those of K. 
 f/ires, Sch., and not hemispherical like those 
 of the mainland E. amygdalina. 
 
AND THEIR ESSENTIAL OILS. 63 
 
 fo^ The oil of the Tasmanian tree closely approaches 
 in chemical composition that of K. dives, 
 Sch. 
 
 Labillardier's name for the Tasmanian tree must, of 
 course, stand, as that has priority, and to us it appears 
 too late in the day to alter the specific appellation of the 
 other ; but if a systematic distinction is necessary in future, 
 we would suggest that it might be known, to botanists at 
 least, as K. amygdalina, var. Australiana. This form is 
 faithfully figured by Mueller in his " Eucalyptographia," 
 and is also illustrated by us in our work " Eucalypts and 
 Their Essential Oils" (p. 168). The varieties recorded 
 by Bentham, we find, belong to K. Eisdoni rather than 
 K. amygdalina. 
 
 CHEMISTRY. 
 
 Essential Oil. Material of this species known as 
 l( Black Peppermint" was received from various local- 
 ities in Tasmania, collected at various times of the year, in 
 order that definite conclusions might be formed as to the 
 specific differences between the oil of K. amygdalina of 
 Tasmania and that of the tree known in New South 
 Wales and Victoria as E. amygdalina. Although the 
 general character of the oil of the Tasmanian tree places 
 it in the "amygdalina group " of these oils, yet it differs 
 considerably from that of the New South Wales form, and 
 more closely approaches in constituents and physical pro- 
 perties the oil of K. dives, with the exception that the 
 Tasmanian K . amygdalina contains a little more eucalyptol 
 than does that of E. dives. Commercially the oil could be 
 utilised for purposes similar to those to which that of E. 
 dive x is put, but it would not pay to submit it to fractional 
 distillation in order to separate the eucalyptol portion, as 
 is now often carried out with the oil of the New South 
 AVales form, any more than it would pay to do so with the 
 oil of E. dives. The yield of oil of the New South Wales 
 form of E. amygdalina is almost twice that obtained with 
 the Tasmanian trees, and even E. dires appears to yield 
 a greater quantity of oil than does the E. amygdalina of 
 Tasmania. The oil of the Tasmanian E. amygdalina 
 differs from that of the New South Wales form in that it 
 contains much less eucalyptol, has a very high laevo-rota- 
 tion, contains more phellandrene, and is much less soluble 
 in alcohol. The odour of the oil is also much less aro- 
 matic. 
 
64 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 The following tabulated results give the general char- 
 acters of the crude oil from three consignments, col- 
 lected at the localities and on the dates given: 
 
 Nubeena, Tasmau 
 
 Hobart. Peninsula. Hobart, 
 
 (16.4. 1 -2 ) (18.4.12.) (15.6.1-2.1 
 
 Yield of oil 1-64 per cent. 2-04 per cent. 1/62 per rent. 
 
 Specific gravity at 
 
 15 C 0-883 0-8668 0-8848 
 
 Rotation a D ... -75-1 -59-1 - 67'3- 
 
 Ref. index at 18. 1-4790 At 20 =1 -4767 At 18= 1-476] 
 
 Soluble In 1 vol. 80/ 7 vols. 70/ 1 vol. 80/ 
 
 alcohol alcohol alcohol 
 
 Eucalyptol: 12 per cent. 24 per cent. 16 per CHIU. 
 
 S.N. of ester and 
 
 free acid 3-1 S.N. = 2*9 S.N. = 3'^i 
 
 The eucalyptol was determined by the resorcinol method 
 and although this would seem to indicate the presence o 
 a larger amount of that constituent, yet the result is mon 
 accurate than would be the case if determined by th< 
 phosphoric acid method. 
 
 The Nubeena sample contained less high boiling con 
 stituents than did the Ilobart material, arid consequent 1\ 
 was of less specific gravity. It also contained a littl< 
 more eucalyptol. 
 
 On rectification, nothing distilled below 174 C. (corr. 
 with either sample. The Hobart (16.4.12) oil gave 5^ 
 per cent, distilling between 174-195 C., and 37 pe: 
 cent, between 195-255, mostly between 230-240. Th< 
 Hobart sample (15.5.12) gave 63 per cent, betweei 
 174-195, and 32 per cent, between 195-245. Th< 
 Nubeena sample gave 83 per cent, distilling b?tweei 
 174-195, and 10 per cent, between 195-266. 
 
 These fractions gave the following results: 
 
 Hobart. Hobart. Nubei-na. 
 
 (16.4.12.) (ln.ft.W 0*.4.1-_>. i 
 
 First Fractions 
 Specific gravity 
 
 at 1 5 C '. . 8589 866-2 8605 
 
 Rotation a D . - 86 '8 -733 - 62 '8 
 
 K.'fractive index Atl8=l'4738 At 18= 1 "4729 At20=l'474fr 
 
 Second Fractions 
 Specific gravity 
 at!5C 0-9191 0-9184 08939 
 
 Rotation a,, ... 14-9 - 17'2 -23-9 
 
 Refractive index At 18=l-4833 Atl8=l-4823 At 20= 1-482 
 
AND THEIR ESSENTIAL OILS. 65 
 
 The high boiling portions of these oils contained a con- 
 siderable quantity of piperitone, as is the case with E. 
 dives \ thus the temperature did not rise much above 
 255 C. 
 
 Besides the above material, sent by the museum col- 
 lector, we also received the leaves of the " Black Pepper- 
 mint " from Scottsdale, forwarded by Mr. A. H. Higgs 
 (6.3.12.). This material gave a yield of oil equal to 2'32 
 per cent., and this crude oil had the following charac- 
 ters- Specific gravity at 15 = 0*8765; rotation 
 a D : -429; refractive index at 23 = 1'4787; soluble 
 in 5 volumes 80 per cent . alcohol ; had saponification 
 number for esters and free acid 2'9 ; and contained 20 
 per cent, eucalyptol. On rectification, 80 per cent, dis- 
 tilled between 174-193 C. and 13 per cent, between 
 193-2620. 
 
 The fractions gave the following : 
 
 Sp. Gr. at Ref. Index 
 
 15. Rotation a D at 18 C. 
 
 First fraction 0'8599 ... 53-2 ... 1-4779 
 
 Second fraction.... 0-9092 ... -7-1 ... 1-4936 
 
 The oil distilled from the leaves of the " Black Pepper- 
 mint " of Tasmania, E. amygdalina, from material all 
 over the island, is thus seen to have considerable uniform- 
 ity in composition. 
 
 EUCALYPTUS COCCIFERA, Hook. f. 
 
 (" Mountain Peppermint."} 
 BOTANY . 
 
 Historical. This tree was described by Hooker fil. in 
 the " London Journal of Botany " (VI. 477) in 1847, and 
 afterwards by Miquel, in " Ned. Kruidk. Arch/' (IV. 
 133), in 1859, under the name of E. daphnoides. 
 
 Remarks. It is generally recorded as one of the few 
 endemic Eucalypts of Tasmania, and as it only occurs 
 near or on the snow-line does not assume large proportions, 
 consequently its economics are limited. 
 
66 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 So far, at least, it has not been recorded from the main- 
 land. 
 
 CHEMISTRY. 
 
 nfi/rt Oil. Material of this species was obtained 
 from Mt. Wellington, at an altitude of about 4000 feet. It 
 was collected in July, 1908. The principal constituent 
 in the oil of this species is phellandrene, and pinene was 
 practically absent. Eucalyptol was present only in small 
 amount, probably not more than 3 per cent, in the first 
 fraction. Traces of eudesmol were detected when the oil 
 was first distilled. This oil also contains a small amount 
 of the " Peppermint " constituent Cpiperitone), and thus 
 belongs to the " Peppermint " group of these oils, of which 
 group K. divrx may be considered the type. The chemical 
 results show K '. cord,/ era to be very closely related to K. 
 rnrifiri-ii. The yield of oil is somewhat small for a phel- 
 landrene-bearing Eucalyptus species, and consequently 
 K . cord fern has no commercial value as an oil -producing 
 tree. 
 
 The average yield of oil from leaves and terminal 
 brauchlets = 0'609 per cent. The crude oil was of an 
 amber colour. It had specific gravity at 15 C. = 0*8810 , 
 rotation a D 35'8; refractive index at 24 C. = 
 
 T4831, and was insoluble in 10 volumes 80 per cent, alco- 
 hol. The saponification number for the esters and free 
 acid was only 4'9. 
 
 On rectification, a small quantity of acid water and 
 volatile aldehydes came over below 170 C. (corr.), at 
 which temperature the oil commenced to distil. Between 
 170-183 C. 69 per cent, distilled; between 183-235 5 per 
 cent. ; and between 235-278 20 per cent. These frac- 
 tions gave the following results: 
 
 Si>. Gr. at Ref. Index 
 
 Rotation a D . ^j, at 24 C. 
 
 First fraction 43-4 ... 0-8561 ... 1-4773 
 
 Second fraction.... 25'2 ... 0-8705 .., 1-4813 
 
 Third fraction .... ... 0-9199 ... 1-4952 
 
 The high boiling fraction consisted largely of a sesquiter- 
 pene. 
 
AND THEIR ESSENTIAL OILS. 
 
 67 
 
 4. AVERAGE YIELD OF OIL FROM THE 
 SEVERAL SPECIES OF EUCALYPTUS. 
 
 The leaves and branchlets were taken in all cases just 
 as would be done for commercial purposes, and the leaves 
 were as fresh as it was possible to obtain them. The aver- 
 age yield has been given in preference to that of any one 
 distillation, as this mean more nearly represents the com- 
 mie rcial production. The percentage amount has been 
 calculated into weight of oil from 1000 Ib. of material, 
 for the means of ready reference. The results are all of 
 our own distillation from Tasmaniaii material. For com- 
 parative results see the tables for the mainland species 
 published in our work " Research on the Eucalypts " 
 (pp. 273 and 284). It will be noticed that much of this 
 Tasmanian material was collected during the winter 
 months, at a time of the year when the oil is not so abun- 
 dant in the leaf; consequently these results may be con- 
 sidered a minimum yield for the species. 
 
 Yield per 1000 Ib., 
 
 Percentage Leaves and Termin- Dates of 
 Yield. al Branchlets. Colleclion. 
 
 2-32 
 1-90 
 
 1-52 
 1-45 
 
 1-38 
 
 1-28 
 
 1 13 
 
 1-01 
 
 1-01 
 897 
 802 
 793 
 764 
 695 
 657 
 609 
 
 544 
 
 482 
 387 
 163 
 
 Species. 
 E. cordata 
 
 Number 
 of 
 Distil- 
 lations. 
 
 1 
 
 E. amygdalina ... 
 
 4 
 
 E. Delegatensis ... 
 E. linearis . 
 
 4 
 3 
 
 E. Risdoui 
 
 E. Mueller! 
 
 E. urnisiera 
 
 E. Perriuiana 
 
 E. phlebophylla. 
 
 E. unialata 
 
 E. regnans 
 
 E. virgata 
 
 E. vernioosa .... 
 
 E. obliqua 
 
 E. taeniola 
 
 E. coccil'era . 
 
 E. virninalis 
 
 E. Rodwayi 
 E. Gunnii .. 
 E.acervula.. 
 
 Ib. 
 
 oz. 
 
 
 23 
 
 3 
 
 31902 
 
 
 
 i 4-1912 
 
 It) 
 
 
 
 I 51912 
 
 
 
 ( 3-1912 
 
 
 
 ^ 71908 
 
 15 
 
 3 
 
 t 81912 
 
 
 
 <1 1912 
 
 14 
 
 8 
 
 J(5 -19C8 
 
 
 
 (41912 
 
 13 
 
 13 
 
 > 31902 
 141912 
 
 12 
 
 13 
 
 71908 
 
 11 
 
 5 
 
 71908 
 
 10 
 
 
 
 7 1912 
 
 10 
 
 
 
 61912 
 
 8 
 
 15 
 
 81912 
 
 8 
 
 
 
 71908 
 
 7 
 
 15 
 
 61912 
 
 7 
 
 10 
 
 51912 
 
 6 
 
 15 
 
 7 1908 
 
 6 
 
 9 
 
 61912 
 
 H 
 
 I 
 
 71908 
 
 
 
 S 41912 
 
 
 
 t 8 1912 
 
 4 
 
 13 
 
 61912 
 
 3 
 
 14 
 
 51912 
 
 1 
 
 10 
 
 41912 
 
68 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 5. TABULATED RESULTS WITH THE CRUDE 
 OILS, TOGETHER WITH THEIR PRINCIPAL 
 CONSTITUENTS. 
 
 The full analysis of any particular oil will be found 
 described under that species. Where more than one result 
 is given, the figures represent the highest and lowest 
 obtained by us. Constituents, other than those enumer- 
 ated, may be present in small amount in many of the oils, 
 but only those found have been enumerated. Volatile 
 aldehydes are always present in the crude oils in small 
 amount, but they are not identical in all the species. The 
 saponification number includes that of the free acid as 
 well as the ester. The alcohol used in determining the 
 solubilities was standardised for percentage of absolute 
 alcohol by weight. The refractive indices were taken with 
 a Zeiss Abbe refractometer, and the temperatures given 
 are those of the circulating water. The yield of oil we 
 obtained with the several species is given in a separate 
 table; these results were from green material collected as 
 would be done for commercial oil distillation. E . globu- 
 lus is not included in this list, as the oil is so well known ; 
 for that reason we did not obtain leaves from Tasmania 
 for distillation. 
 
AND THEIR ESSENTIAL OILS. 
 
 69 
 
 "30 
 
 c I 
 
 Chief Constituents Found. 
 
 Dextro-rotatory pinene, phel 
 drene, eucalyjjtol, gerar 
 geranyl-aeetate, solid and lit 
 paraffins, sesquiterpene 
 Phellandrene, eucalyptol, pip 
 tone, sesquiterpene 
 
 Phellandrene, eucalyptol, pip 
 
 tone, eudesmol 
 Eucalyptol, dextro-rotatory ] 
 
 ene, esit?r 
 Phellandrene, piperitone, ses( 
 terpene 
 Dextro-rotatory pinene, phel 
 drene, eucalyptol, esters, ses< 
 
 terpene 
 Eucalyptol, phellaridrene, pip 
 tonej sesquiterpene 
 Eucalyptol, dextro-rotatory \ 
 ene, esters 
 Phellandrene, eucalyptol, aroi 
 dendral 
 
 Eucalyptol, dextro-rotatory \ 
 
 
 
 [ 
 I 
 
 1 
 
 *r 
 
 I 
 
 1* 
 
 3 
 
 B 
 
 
 C ( 
 
 
 
 
 
 O +a 
 
 A C 
 
 o o~~ 
 
 o 
 
 S - ^_S 
 
 o o 08 o 
 
 
 ^" S 
 
 o ^ v 
 
 
 
 C r-^*O 
 
 o o "S ^ o 
 
 
 w 
 
 ON -2 r 
 
 S 
 
 J85 
 
 S 8 | i 
 
 
 g 
 
 o _ o 
 
 -~ o 
 
 ~ 
 
 O O O 
 
 r~7i 
 
 
 c ^ o3 
 
 
 
 3ooO 
 
 1 1 00 
 
 
 II 
 
 ^2! 
 
 CC ^_' 
 
 ^ 
 
 O O . . 
 
 S 
 
 J3 
 
 > * ? a 
 
 > 
 
 ll 
 
 "o "o ?o 'B'cS 
 
 HA 
 
 * 
 
 
 ^^ 
 
 2^ 
 
 CO -^ ^ W 
 
 
 
 0> 
 
 2SS 
 
 o 
 
 3 O 
 
 o o o o o 
 
 1 
 
 II 
 
 IsS! 
 
 05 CO 
 Cx i I > X' 
 
 Oi 
 
 OS S 
 GO (?* 
 
 J2 
 
 03 OS OS S S3 
 
 rt- , ^ --. O ., 
 
 Wi Oi Oi 4-J CX *"* 
 
 W7 O CO >O O 
 
 1 
 
 & 
 
 
 ? 
 
 
 r T ? r^ 
 
 
 
 
 
 
 
 
 S* 5 
 
 rr- ^ 
 .tj S3 03 
 
 O JO 
 
 go Oi cN Oi 
 
 GO 
 
 rH f. 
 
 00 CO (M FH CO 
 
 
 S/s| 
 
 l 
 
 ^ 2C ^ 
 
 i-H 
 
 CO CO 
 
 AO tC t> -u 00 C 
 
 
 ___ c 
 
 O O 
 
 ^H r-H -( 00 
 
 
 
 o o 
 
 o o o o o 
 
 
 ** "as Q 
 
 fli O tf^ 40 
 
 i t"'iT 
 
 Oi 
 
 + 
 
 00 "H 
 
 T + 
 
 o o ^ oo oo 
 
 7 + T 7 + 
 
 
 >O 
 
 CO GO 00 O 
 
 00 
 
 * -* 
 
 CO co co Oi 
 
 
 
 
 
 CD >-H 
 
 
 
 lj$j 
 
 Oi CO O Q^ GQ 
 00 00 *^ 00 GO 
 
 1 1 
 Oi 
 
 
 i i GO 2 00 S 
 
 
 03 
 
 C C 
 
 o 
 
 
 
 
 
 
 
 
 
 
 
 
 
 c 
 
 
 .S 
 
 w 
 
 C 
 
 1 
 
 
 I 
 
 ^ "5 g 
 
 
 JS 
 
 
 
 1 
 
 = *& jg 
 
 "cS 
 
 fcJD c3 
 
 *C s g, -S ' 
 
 
 
 
 3i 33 C 
 
 1 
 
 Q O 
 
 111 
 
 
 
 pq K w 
 
 w 
 
 w w 
 
 pd fiJ pu Ex] 
 
 
70 
 
 A RESEARCH ON THE EUCALYPTS OF TASMANIA 
 
 
 = 'C 
 
 . j, 
 
 
 i 
 
 .J. i 
 
 i 
 
 
 
 
 1 1 
 
 1 
 
 
 
 
 cL 
 
 
 'S, 
 
 Ls^ 
 
 "S. 
 
 
 =. 
 
 s,s 
 
 1, 
 
 I 
 
 i 
 Chief Constituents Found. 
 
 Laevo-rotatory pinene, ph< 
 drene, eucalyptol, eudesrno 
 Phellandrene, eudesrnol, pi 
 
 tone, esters, sesqulterpene 
 Eucalyptol, phellnndrene, pi 
 
 i- 
 
 \ 
 
 * 
 IL 
 
 c 
 
 Eucaly ptol, dextro-rotatory 
 
 ene, sesqulterpene 
 Phellandrene, eucalyptol, pi 
 tone, eudesinol, sesquiterpe 
 Eucalyptol, dextro-rottory 
 
 ene, esters 
 Eucalyptol, dextro-rotatory 
 
 
 ^ 
 
 f 
 L 
 
 I 
 
 >' 
 & 
 
 Eucalyptol, dextro-rotatory 
 
 Mir 
 
 EucalyptoJ, dextro-rotatory 
 ene, phellandrene, esters, 
 
 quiterpenr 
 Phellandrene, eucalyptol, pi 
 
 8. 
 
 '= 
 
 f 
 
 | 
 
 4- 
 1 
 
 r 
 
 c 
 
 i 
 
 
 
 
 o o 
 
 
 
 
 
 
 
 
 
 
 >> S 
 
 ll 
 
 fc ! 
 
 O 
 
 
 o 
 
 CO 
 
 1 
 
 
 I 
 
 1 
 
 o 
 
 fH 
 
 c* 
 
 
 c 
 
 o 
 
 
 
 
 
 
 O O 
 
 o 
 
 
 
 
 
 
 
 |1 
 
 2 S 
 
 S 
 
 a 
 
 fefc 
 
 1 g 
 
 g 
 
 
 s 
 
 i 
 
 g" 
 
 X 
 
 
 ?! 
 
 111 
 
 O 
 
 a 
 
 * 
 o"c 
 
 V. at 
 
 o "o 
 
 "o 
 
 
 "c 
 
 o 
 
 ~6 
 
 
 3T 
 
 2* 
 
 ^T 
 
 
 o cc 
 
 4f3 *o 
 
 N- 
 
 ^H 
 
 
 - 
 
 - 
 
 r: 
 
 
 
 X 
 
 oa 
 
 
 O^f 
 
 c* eo 
 
 So 
 
 
 X 
 
 T. 
 
 X 
 
 
 
 
 -H O< 
 
 C^ <-H 
 
 
 (N 
 
 i-i Oi 
 
 
 
 
 
 
 
 
 
 n >; 
 
 s s 
 
 * 'S 
 
 
 08 oS 
 
 ts 08 
 
 oe 
 
 
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AND THEIR ESSENTIAL OILS. 71 
 
 6. ILLUSTRATIONS. 
 
 E. unialata, sp. nov. 
 
 1. Abnormal or "Sucker'* leaves. 
 
 2. Twig with buds and normal leaves. 
 
 3. Branchlets with fruits. 
 
 E. Rodwayi, sp. nov. 
 
 1. Abnormal or " Sucker " leaves. 
 
 2. Twig with buds and normal leaves. 
 
 3. Branchlets with fruits. 
 
 E. taeniola, sp. nov. 
 
 1. Abnormal or " Sucker " leaves. 
 
 2. Individual leaf. 
 
 3. Branchlet with buds, flowers, and fruits (an unusual 
 occurrence) . 
 
 [All natural size.] 
 
 Collecting Eucalyptus leaves in Tasmania. 
 
 7. INDEX TO SPECIES. 
 
 PAGH 
 
 E. ACEKVULA 10 
 
 E. COltDATA 
 
 E. GLOBULUS 
 
 E. GUNNII 17 
 
 E. LINEARIS 
 
 E. MUELLERI 23 
 
 E. PERRINIANA 
 
 E. PHLEBOPHYLLA 
 
 E. REGNAN8 31 
 
 E. RISDONI 
 
 E. UNIALATA 38 
 
 E. URNIGERA 40 
 
 E. VERNICOSA 42 
 
 E. VIMINALIS 
 
 E. DELEGATENSIS 
 
 E. OBLIQUA 50 
 
 E. RODWAYI 53 
 
 E. VIRGATA 56 
 
 E. TAENIOLA 60 
 
 E. AMYGDALINA 62 
 
 E. COCCIFERA 65 
 
 JOHN VAIL, 
 GOVBBNMENT PEINTEH, TASMANIA 
 
R.T.B. del. 
 
 EUCALYPTUS UNIALATA, R.T.B. et H.G.S. 
 
R.T.B. del. 
 
 EUCALYPTUS RODWAYI, R.T.B. et H.G.S. 
 
R.T.B. del. 
 
 EUCALYPTUS T^ENIOLA, RTB, etH.c.s. 
 
,_Z. vernicosa. 
 
 
 400T) FT. ABOVE SEA LEV! 
 
 ON THE HAETZ Mom 
 TAINS. LEAVES CARRII 
 
 2 MILES. 
 
 THE SAME THEN 
 
 "PACKED," 12 MILES TO 
 GEEVESTON, THENCE BY 
 
 BOAT TO HOBART AND 
 
 SYDNEY. 
 
 2 CWT, TO THE LOAD. 
 
 DRAWING E, Perrinia 
 12 MILES TO OUHE BRII 
 THEN 25 MILKS BY HO] 
 TEAM TO MACQUAI 
 PLAINS, THENCE BY TR. 
 TO HOBART AND BOAT 
 SYDNEY. 
 
 COLLECTING EUCALYPTUS LEAVES IN TASMANIA. 
 
RETURN TO DESK FROM WHICH BORROWED 
 
 CIRCULATION 
 
 This book is due on the last date stamped below, or 
 
 on the date to which renewed. 
 Renewed books are subject to immediate recall. 
 
 JUN 111974 70 
 
 MAY 2 2 : REC 'D2R 
 
 MAY 2 2 " 
 
 EDUt-PSYCH. LIB 
 
 P CJRC 
 
 LD 21-32mr-3,'74 
 (R7057slO)476 A-32 
 
 General Library 
 University of California 
 Berkeley 
 
R. 
 
 O4*>- V*y j.10 J. 
 
 A resear0lr on the 
 
 : 6462 5 
 
 of Tasmania 
 
 TP958 
 B2 
 
 
 UNIVERSITY OF CAUFORNIA LIBRARY