IN MEMORIAL John 3 T ,vett / From the collection of the n m PQB0 relinger v JJibrary p San Francisco, California 2006 CYATHEA ARBOREA, A TREE FERN, Scene on the Chagres River, Central America. FOURTEEN W;EEKS IN BOTANY BY ALPHONSO WOOD, A.M., AUTHOR OF "THE CLASS-BOOK OF BOTANY," "OBJECT LESSONS IN BOTANY," " PLANT RECORD," ETC. AND J. DORMAN STEELE, PH.D., AUTHOR OF THE " FOURTEEN-WEEKS SERIES IN NATURAL SCIENCE,' ' There breathes, for those who understand, jl voice from every flower and tree ; jlnd in the work of Nature's hand Lies Nature's best Philosophy." A. S. BARNES & COMPANY, NEW YORK, CHICAGO, AND NEW ORLEANS. 1879. WOOD'S BOTANY. I. OBJECT LESSONS IN BOTANY, Pleasing lessons for young learners. II. BOTANIST AND FLORIST, A thorough text-book, comprehensive and practical. III. THE NEW CLASS-BOOK, A superb and exhaustive compilation and encyclopedia of the science. IV. BOTANICAL APPARATUS, A complete field outfit, consisting of Portable Trunk, Drying Press, Trowel, Lens, Tweezers, Etc., prepared under the supervision of Prof. WOOD. V. THE STUDENT'S PLANT RECORD, A book of blank forms, facilitating the analysis of plants, and recording the results of such analysis, and the progress of the student. *** The Publishers will send either of above, postage or freight prepaid, on receipt of price. Copyright, 1879, by A. S. Barnes &> Co. PREFACE. HE plan of this work differs from that of the ordinary Botany. The method pur- sued is to introduce the pupil at once to the study of the plant itself, by means of elaborate illustrations, and living speci- mens. The parts and functions, together with the generic and specific characters of each plant, are pointed out and described.' The thing being seen, is then named. No new term is introduced until a necessity arises for its use. About one hundred rep- resentative plants are thus explained. The work may therefore be considered as a limited Flora. But it is much more. Through an acquaintance with these representative plants, the pupil is gradually led to a knowledge of the principles of Botany. In the com- mon treatise he is told the general law and then given illustrations ; in this, he is shown the instances, and thence conducted to the broad truth of Nature. The selection of plants for analysis has been deter- mined by the following considerations : ( i.) The plant should be common throughout the country and hence accessible to every learner; (2.) It should flower 541759 VI PREFACE. in the spring or early summer, that being the season when the study is generally pursued in our schools ; (3.) It should have conspicuous parts, at least the earlier ones, adapted to the comprehension of a begin- ner ; ( 4.) It should belong to one of the more impor- tant Orders, as neither the limits of the book nor the requirements of the plan adopted would admit the study of them all ; finally, the selection was often influ- enced by some intrinsic feature which fitted the plant to illustrate a special principle in vegetable life, as sleep, irritability, cross-fertilization. This work is merely an introduction, conducting the pupil across the gateway only. Yet it is not de- signed for infants ; the rather for learners capable of thought and reason. To all such it offers a helping hand, seeking to smooth their path and to awaken such an interest in the subject as will induce them to pursue their investigations in more advanced books and in the broader field of Nature itself. The illustrations in this work are nearly all from original designs prepared by Mr. Sprague, " the most accurate of living botanical artists," and Mr. Emerton, designer of the illustrations in Prof. Eaton's North American Ferns. SUGGESTIONS TO TEACHERS. HENEVER possible the plant described in the lesson should be in the pupil's hand for examination. This is the very life of the recitation. A constant sup- ply of specimens should therefore be secured for this purpose. Let them be sought a day in advance and in the order of the book. The arrangement may, however, be changed when necessary to accommodate the collector's convenience. Should any terms then arise not already explained, their meaning can always be found by reference to the Glossary at the close of the book. After a few lessons have been thoroughly understood, the pupil need no longer confine his attention to the few plants treated in the text. He can readily repeat the pro- cess of analysis on any specimen he is able to secure. He should, however, be admonished that this will lead to desultory habits of study unless he completes every analysis which he begins, and records the result, in his ever-present memorandum book. The strictest care should be observed in completing the Tablets of this work or of the Plant Record. They viii SUGGESTIONS TO TEACHERS. should be carefully and neatly filled up from notes previously arranged, and adjusted in every word and sentence, so that there may be no erasures and no interlining, and the Record may represent in every particular the pupil's best work. Blank forms should be drawn on the blackboard at every recitation, and pupils be required to complete them, subject to the criticism of the teacher and of the class as to analysis, expression, style, spelling, punctuation, etc. A good microscope is essential to satisfactory botanical work. Small hand magnifiers for the use of the pupils and a larger table instrument for the teacher, can be procured at a slight expense, of the publishers of this book, Messrs. A. S. Barnes & Co., in and 113 William St., New York. The course of investigation marked out in these lessons is such that while it unfolds the general laws of plant-structure and plant-life, it also leads to that special knowledge of the plant itself which prepares one to determine, by the use of analytical tables, its name and place in the Vegetable System. Hence a Descriptive Flora with tables for analysis is the proper sequel or companion of this treatise. Such a Flora can be obtained from the Publishers of this book. With its aid the student can trace any unknown plant which he examines to its Order and Name as readily as one turns to a word in a Dictionary. A system of questions for study or review, gener- ally applicable to all plants, will be found in the Appendix. TABLE OF CONTENTS. CHAP. PAGE I. PIGEON-WHEAT Moss Polytrichum. The Analysis. Cap- sule. Operculura. Calyptra. Peristome. Spores. Flowers. The Flowerless Plants. How the Moss grows. 13 II. THE APPLE Moss Bartramia. The double peristome. Fugacious calyptra. Cellular structure. THE Musci. 17 III. THE POLTPOD FERN Polypodium. The rhizome. Frond. Sporangia. Spores. Forked venation. How the Fern grows. 20 IV. THE OSMUND FERNS Osmunda. The vernation. The species. THE ORDER FELICES. Tree Ferns. THE CRYPTOGAMIA. The uses of Ferns. The Climbing Fern. The Brake. The pioneer vegetation 24 V. THE DOGTOOTH VIOLET Erythronium. The two Regions. The bulb. Leaf. Venation. The Calyx. Corolla. Sta- mens. Pistils. The fruit. Seeds. Pollen. The province ENDOGENS. THE PHENOGAMIA 29 VI. THE TULIP Tulipa. The tunicated bulb; its contents. The flower. Varieties. The Tulip mania in Holland 35 VII. THE SPRING BEAUTY Claytonia. Tubers. A raceme. The petals and their colored lines. Opposing stamens. The seed and its albumen. ^Estivation. Our two species. The PORTULACACE^E. The Portulacas. The province EXOGENS. 39 VIII. THE EARLY CROWFOOT Ranunculus. Fasciculate roots. Perennial herbs. The nectary. Polyandrous and h*y- pogynous stamens. The simple fruit distinct carpels. 46 IX. BULBOUS CROWFOOT Ranunculus. An inaxial root. The corm. Reflexed sepals ; economy. Plan of the flower. . 50 X. THE LIVERLEAF Hepatica. Crown-stem. Palmate vena- tion. Involucre. Apetalous flowers. Anatropous seeds. 54 XL RUE ANEMONE Anemone. Tuberous root. Umbel. Com- pound leaves. Distinctness of organs. Absence of honey. 58 XII. WOOD ANEMONE Anemone. Creeping root; rhizome. Solitary inflorescence. Species. Order RANUNCULACE^:. 60 XIII. BLOODEOOT Sanguinaria. Rhizome. Juice. Caducous sepals. Parietal placentae. Dicotyledonous embryo 64 XIV. THE POPPY Papaver. An annual herb. The species. Order PAPAVERACE^. The California Poppy. Celan- dine. Use and culture of Opium 68 XV. THE VIOLETS Viola. A cucullate leaf. Resupinate, ir- regular flowers. Adnate anthers. Cleistogene flowers. Economy in pollen 71 X CONTENTS. CHAP. PAGE XVI. THE GARDEN VIOLET Viola tricolor. Lyrate-pinnatifid stipules. Auriculate sepals. Order VIOLACE^E. Species. 75 XVII. CHICKWEED Stellaria. Nodes. Internodes. Centrifu- gal inflorescence. Bifid petals. Free central placenta. 78 XVIII. THE PINK Diantlms. Caudex. Caulis. The Calyx as a flower-cup. Proterandrous flowers. Teratology. Order CARYOPHYLLACE.E 80 XIX. THE WILD GERANIUM. Nodes. Internodes. Stipules. Reg- ma. Carpophore. Folded cotyledons. Herb Robert. 83 XX. THE HORSE-SHOE GERANIUM Pelargonium. The Spur. 8G XXI. YELLOW WOOD SORREL Oxalis. Leaf trifoliate. Leaf- let obcordate. The leaf -axils. Monadelphous stamens. Contorted aestivation. Sleep of plants. The Order. ... 89 XXII. JEWEL WEED Impatiens. Corolla irregular and spurred. Irritable fruit. Contrivances for scattering seeds 93 XXIII. NASTURTIAN Tropaeolum. Peltate leaves. Spurred sepal. Unguiculate petals. The order GERANIACE^E. 95 XXIV. SHEPHERD'S PURSE Capsella. Leaves amplexicaul. Flowers cruciform, tetradynamous. A silicle 89 XXV. THE TOOTHROOT CRESS Cardamine. Asilique. Cotyle- dons accumbent incumbent. Order CRUCIFER.E ... 101 XXVI. STRAWBERRY Fragaria. Scape. Cyme. Perigynous sta- mens. Strawberry fruit. Quincuncial estivation. Hairs. 104 XXVII. THE APPLE TREE Pyrus. Trunk. Wood. Medullary rays. Annual layers. Food of plants. Circulation of the sap. Ovary adherent. Fruit a pome. Seed. Germination. 107 XXVIII. THE ROSE Rosa. History. The Prickles. Odd-pin- nate leaves. Ovary inferior. Seed suspended. The Hip. The Double Rose. The order ROSACES. Peach, Quince, Blackberry, Spirea, etc 112 XXIX. THE PEA Pisum. Tendrils, their action. Papiliona- ceous flower. Diadelphous stamens. Legume 117 XXX. THE LOCUST TREE Robinia. Stipular spines. Sensi- tiveness. The Sensitive Plant. The Moving Plant. The order LEGUMINOS.E 121 XXXI. THE EVENING PRIMROSE OZnothera. Leaves spirally arranged. Root biennial. Calyx adherent, tubular. Flowers nocturnal . . 125 XXXII. LADY'S EARDROPS Fuchsia. Angular pollen grains. Hybridization. Order ONAGRACE^E. Zauschneria. . . 128 XXXIII. SWEET CICELY Osmorhiza. The axial root. Decom- pound leaves. Sheathing petioles. Compound um- bel. Involucels. The cremocarp. Carpophore 131 XXXIV. GOLDEN ALEXANDERS Carum. Ovary inferior. Ribs and vitee of the fruit. Oil tubes. Action of light. The order UMBELLIFER^E 134 CONTENTS. xi CHAP. PAGE XXXV. THE MOUSE-EAR EVERLASTING Antennaria. Stolons. Dio3cious plants. Heads of florets. Receptacle. In- volucre. Pappus clubby. Cypsela 137 XXXVI. ROBIN'S PLANTAIN Erigeron. Heads radiate. Florets of the ray. Florets of the disk. Ligul ate corolla. . 140 XXXVII. THE DANDELION Taraxacum. Runcinate leaves. Ra- diant, homogamous heads. Chaff. Syngenecious anthers. The order COMPOSITE. Chickory, Camo- mile, Aster. Chrysanthemum. Solidago 143 XXXVIII. THE CHECKERBERRY Gaultheria. Urceolate corolla. Curious fruit. The Black Checkerberry 147 XXXIX. THE PYROLAS. Anthers inverted in bud ; opening by pores. The six species 150 XL. PRINCE'S PINE Chimaphila. Horned anthers 152 XLI. THE KALMIAS. Elastic stamens. Pollenization. The order ERICACEAE. The Heaths. Blueberries. Cranber- ries. Azalias. May-flower 155 XLII. THE PITCHER PLANT Sarracenia. Ascidia. Order SAR- RACENIACE^E. Carnivorous Plants. Venus' Flytrap . . 158 XLIII. THE AMERICAN COWSLIP Dodecathron. Opposing stamens. Dimorphism. Free central placenta 161 XLIV. CHICK WINTERGREEN Trientalis. 7-parted flowers ... 164 XLV. THE LOOSESTRIFES Lysimachia. Verticillate leaves. Monadelphous stamens. Opposing stamens explained. Order PRIMULACE^E. Cyclamen. Anagallis. Primrose. 165 XL VI. THE SPEEDWELLS Veronica. Why so called. A two- celled capsule. Exserted stamens. The species .... 170 XL VII. TOAD FLAX Linaria. Pentamerous flowers. Personate corolla. The spur, what can reach its honey. Order SCROPHULACE^E. Digitalis. Pentstemon 173 XL VIII. THE GROUND IVY Nepeta. Naturalized plants. Bi- labiate corolla. Halved anthers. Seeds apparently naked. The Catmint 176 XLIX. BLUE CURLS Brunella. Cuspidate bracts. Hairs jointed. The lip a doorstep for bees. Order LABIATE. Pep- permint. Oil of Spike. Lavender 179 L. THE MORNING GLORY Ipomcea. Ephemeral flowers. Supervolute aestivation. The disk. Use of pollen ; nectar. Septifragal dehiscence. Albumen. Vital- ity of seed. The bud. CONVOLVULACE^E 182 LI. ROCK MAPLE Acer. Tree picturesque. Theory of leaf- f orms. Autumnal colors. Maple sugar. Other Maples. 188 LII. THE HORSE CHESTNUT JEsculus. History. Phyllo- taxy. Digitate leaves. Suppression of ovules. The SAPINDACE.E. The Soapberry tree 192 LIII. THE SILK GRASS Asclepias. Pollinia. Corona, hoods and horns. Cross-fertilization. The ASCLEPIADACE^E. The Cow tree. Carrionflower 195 Xll CONTENTS. CHAP. PAGE LIV. SPOTTED KNOTWOOD Polygonum. Ochre*. Apeta- lous flowers. An achenium. Other species. The nectar defended from ants The POLYGONACE^E .... 199 LV. THE SPURGES Euphorbia. A monandrous flower. A glandular involucre. Poisonous juice. The EUPHOR- BIA CE^E. Tapioca. Caoutchouc ...... 204 LVI. THE WHITE OAK Quercus. Aments. Wind-fertiliza- tion. Acorns. Germination. History. Straight- veined leaves. The CUPULIFER^E. The value of Mast. Oak timber. Nut-galls 207 LVII. THE WHITE PINE Pinus. Acerous leaves. Triple pollen grains. Biennial fruit. The cone. Naked seeds. Root fences. Other species 214 LVIII. THE HEMLOCK Abies. Excurrent trunk. The CONIF- ERS. Pitted cells. The Douglass Fir. The Giant Cedars. Turpentine 218 LIX. THE PALMETTO Sabal. Tree with one bud. Caudex. The endogenous structure. Other Palms. Germi- nation of the Cocoanut. The PALMACE^E. Date Palm. Sago. Vegetable Ivory. Palm oil 223 LX. JACK-IN-THE-PULPIT Arissema. The spadix and spathe. Golden Club. Calla. The ARACES. Sweet Flag. ... 229 LXI. THE SHOWY ORCHIS An orchidaceous perianth. Gy- nandrous stamens. Pollinia. How fertilized. A walking plant 233 LXII. ORCHIS PSYCHODES. O. orbiculata. Lady's Slipper. The ORCHID ACES. Mimicry of insects, birds, etc 237 LXIII. IRIS, or BLUE FLAG. Ensiform leaves. Pollenization. The Fleur-de lis in history 241 LXIV. BLUE-EYED GRASS Sisyrinchium. The IRIDACES 244 LXV. THE TRILLIUMS. Net-veined endogens. Wake-robin. The Bath-flower. Indian Cucumber. The TRILLIACES. 246 LXVI. BELLWORT, or WILD OATS Uvularia. Perfoliate leaves. Loculicidal pods. U. sessilifolia, and other species .. 254 LXVII. LILY-OF-THE- VALLEY Convallaria. Gamopetalous. Ori- gin of the stem. History. Clintonia. The LILIACES. 254 LXVIII. THE STAR-GRASS Hypoxis. Sagittate anthers. Species. 258 LXIX. THE SEDGES. GALINGALE Cyperus. The umbels. The naked flowers. The spikes. The Rushes. Achenium. 263 LXX. THE SEDGES. CAREX. Triangular culm. Monoecious spikes. Perigynium. Glume. The CYPEHACES. Papyrus. . . 265 LXXI. THE GRASSES. The turf. Culm. Sheath. Licrule. Poa pratensis. Wind-fertilization. Blue Grass. Fowl Meadow 271 LXXII. ORCHARD GRASS Dactylis. Secund panicles. Keeled glumes 274 LXXIII. SWEET VEKNAL GRASS Anthoxanthum. Germination of the Grasses. The order GRAMINES. The cereals. Bamboo. Hay of what grasses made 276 BOTANY I. PIGEON-WHEAT MOSS. Description. The portrait is before us (p. 15). We cannot fail to recognize a little rustic friend we have often met in our country rambles, covering the dry knolls in pastures among rocks and stumps.* Examining this plant as a whole, we see that it is a mossy herb, erect, 3 to 8 inches high, branched at the base, above which it is not branched, but simple, as the botanists say. Coming next to study the plant in detail, we find that it is organized, i. e., made of cooperating parts. Five of these the root, stem, leaf, stalk, and fruit are readily distinguished. Analysis.f The ffioot is the base of the plant. It grows in the ground, and is the part first formed. Its use is to hold the plant in its place and to take up nourish- ment from the soil. There are numerous small fibers or rootlets branching from the main root or axis, to give a broader foothold and aid in absorbing food.J The Stem (a b) springs from the root. It is upright, simple, 1 to 3 inches high, round and tapering, or, as we may hereafter say, terete. * Specimens of this plant maybe collected at all seasons of the year, and in drying they will lose none of their comeliness. t Analysis. Greek ana, each, or severally, and luein, to loosen or dissolve, means to consider anything in its different parts separately, one by one. t The life-history of the Moss begins in a mesh of green, gossamer-like threads that spring from the spore which serves for its seed. For a time, 5 to 20 days, this mat slowly gathers strength, when suddenly on one of the crossings a tiny bud appears a whorl of scaly leaves. Now true roots creep down into the soil, the threads drop away, the stem ascends. No one plants the Moss ; it does not follow the track of man in his migrations ; yet it is everywhere present to greet his coming. In the barren sands, in the chinks of the naked rock, wall, or pavement, wherever a spore may find a lodg- ment, there the Moss weaves its tiny mesh, and grows its diminutive forest. 14: PIGEON- WHEAT MOSS. The eare$ are green or brownish, and grow mostly ^fcfti&';.tKa; ujpp<^.j>art of the stem. They are (1) long- pointed, and shaped somewhat like a spear or lance, only narrower, approaching the form of a line ; hence they are said to be linear-lanceolate. The edges are serru- late (Lat. serrula, a little saw). The Stalfc (b c) rises from the top of the stem among the leaves, and is therefore said to be terminal; and as it supports the fruit, it is called the pedicel (pediculus, a little foot). It is erect, usually longer than the stem, smooth, brown, thread-shaped (filiform). The Fruit (c) is borne aloft on the pedicel. It is the last part produced by the plant, the chief end and aim of its whole life. It is a small square box or capsule (7), covered while growing by a hairy cap or calyptra (6). When ripe, the calyptra vanishes, the capsule nods (8), and the lid operculum (9) at the top opens, revealing within a greenish dust. This consists of a multitude of tiny grains or spores, soon to be scattered on the ground, and to serve as seeds. After the operculum has fallen off, the mouth (stoma) remains open, and is seen beautifully bordered by a circlet of teeth. This is called the peristome (Gr. peri, around, stoma, mouth). With a microscope we can see that the teeth are blunt (10), and 64 in number.* Classification. At the top of the stem, before the fruit arises, we may often find a group of organs resembling and indeed serving as a flower (2).f But being colorless and * In other kinds of Moss the number of the teeth is 4, 8, 16, 32 always some power of 2. Sometimes the peristome is double, the inner one consisting of as many little hairs (cilice.) t In Fig. 1 (2) the artist has delineated a male, or sterile flower of Polytrichum (for two kinds of flowers are developed by this Moss). In 4 is seen, greatly mag- nified, the special organs (two antheridia, and 0, o, two paraphyses) of the sterile flower. In 5, also greatly magnified, are seen the two pistilidia of a fertile flower, from one of which the capsule arises, the other proving abortive ; 3 is one of the leaves (sepals). FIG. I. Pigeon-Wheat Moss, Polytrichum commune. The portrait represents the plant in nearly full size. The other figures are dissections, showing the various organs magnified, as under a microscope ; 2, a sterile flower, magnified. 16 PIGEON-WHEAT MOSS. insignificant; in appearance, it is easily overlooked. Hence ,thf eav-ly botanists* called this and all the Mosses, Lichens, &c., Cryptogams (= Cryptogamia), that is, plants with hid- den flowers, or more familiarly, the FLOWERLESS PLANTS. The Name given to this plant by Linnaeus,* the founder of the science of Botany, is Polytrichum, a name derived from the Greek polys, much, thrix, hair ; on account of its hairy calyptra. ANALYSIS OF THE PIGEON-WHEAT MOSS. Parts, Members, Organs. DESCRIPTION. THE PLANT. An herb 5 to 8 inches high, with leafy verdure, branched at base. ROOT. The. basis of the plant, growing downward in the soil. Axis. Crooked, diminishing downward. FIBERS. Many, short, branching from the axis. STEM. One or more from the root, erect, terete, 1' to 3', leafy. PEDICEL. Terminal, smooth, brown, thread-shaped, long, naked. LEAVES. Greenish, linear-lanceolate, 'pointed, crowded above. FRUIT. Terminal, erect at first, finally nodding. CALYPTRA. A cap of matted hairs, pointed at top. CAPSULE. A smatt box, generally four-sided, opening atjtop. Operculum. The Kd of the capsule, round, pointed in centre. Peristome. The fringe of the mouth, consisting of 6k teeth. SPORES. Greenish, dust-like, contained in the capsule, for seeds. CLASSIFICATION. The Grand Division, CRYPTOGAMIA. The Tribe, MOSSES or MUSCI. Family or Genus, Polytrichum. * In his botanical tours in Lapland, Linnaeus found this Moss very abundant, and tells us that in his hours of rest he often made it his couch and pillow. BAETEAMIA POMIFOKMIS. 17 The Record. In the preceding tablet are recorded the principal facts we have now learned concerning the Pigeon- wheat Moss. Review of the Scientific Terms which have been employed and defined in this lesson. If the student will master them here, they need not he explained hereafter. Analysis. Axis. Calyptra. Capsule. Cryptogamia. Lanceolate. Linear. Operculum. Organized. Pedicel. Peristome. Rootlet. Simple. Spores. Stoma. Terminal. Terete. II. THE APPLE MOSS. Description. This pretty Moss is known by its round, apple-shaped capsules. It grows in large, dense tufts, 2' or 3' (inches) high, of a light or bluish-green color, often cov- ering the ground on shady banks or in open woodlands. Analysis. The ffioot is a simple axis, clothed with mi- nute rootlets, which appear like a soft brownish down. The Stems are densely crowded, repeatedly forking, or dicJwtomous (dividing by pairs), covered and concealed by their leaves. The Leares are numerous and crowded on the stem and branches. They are narrower FIG. u . Bartramia pomtf6rmis. than those of the Polytrichum, narrower even (proportion- ately) than a cobbler's awl ; hence we define them as linear- subulate (subula, an awl).* * Viewed under a strong microscope, the leaf of this Moss, and indeed every other part of it, appears a tissue of cells all of one shape and size throughout polygons somewhat longer than wide. In other words, the Moss is wholly composed of cellular tissue. 18 THE APPLE MOSS. The Sta2fc or pedicel is terminal or nearly so, erect, 6" to 10" (seconds = lines or twelfths of an inch) high, slender, yellowish, much ,shorter than the stem. The JPrtlit or capsule (1) is slightly nodding, globular when fresh, oval and showing many ribs or furrows when dry (2). The cap or calyptra (1) is small, smooth, split on one side, and soon vanishing, or fugacious (fugere, to flee away). The lid or operculum is very small, somewhat conical. Under a microscope the peristome shows an outer row of 16 teeth, three of them being seen in the figure (3). There is also an inner row of as many hairs (dim). The Name by which this Moss is known in science is Bartramia. It was conferred by Linnaeus, A. D. 1750, in honor of John Bartram,* of Philadelphia. But this, how- ever, is the title of a family or genus, including several kinds or species. A second name is therefore added to designate the species, f viz., Bartramia pomiformis (Latin, pomum, apple ; forma, form). J The Record. Following the example given in the pre- ceding lesson, the student will now fill the blanks in the annexed tablet. The descriptions are to be drawn from the text or from fresh observations of the plant (p. 17). See directions in " Suggestions to Teachers," p. 6. The Order. The Mosses are among the higher orders of the cryptogams. They have proper stems and green * Bartram was a Pennsylvania farmer, said by Linnaeus to be the greatest natural botanist then living. He traveled through the forests which at that early day covered so large a part of our country, collected plants and established in Philadelphia the first Botanic Garden in America. t The same is true of our Polytrichum, whose specific name is Polytrichum com- mune (- common), or P. commtine. $ Many object to scientific names in an elementary book. It should be remem- bered, however, that they are brief, exact, and universal ; i. e., they are used in all scientific books and are known to all nations. The common names are local, and vary not only in different countries, but in different parts of the same country. In this work the English name is given first, then the classical or scientific. The student should know both, but in conversation may use either. ANALYSIS OF THE APPLE MOSS. 19 fc p i 1 - tT .5 o , "2 o O" .2 ^- ^CC! Q>* g g 'g rrt Qf fl 02 ! ! o g p | d w gl .0 M 1 PM i i i 1 STEM. STALK. i EH' CALTPTBA. CAPSULE. O i QQ 1 20 THE POLYPOD FEBl*. leaves, while the Moulds, Mushrooms and Lichens have neither. Not less than 2000 species have been described, chiefly inhabiting the cool and rocky regions of the Earth. On the cinders of Mt. Hood they form the first verdant specks of vegetation, and the cliffs of Mt. Washington are already green with mossy tufts and beds. Cold swamps are everywhere being filled with Sphagnum and other Mosses, whose remains accumulate and are, in time, condensed to peat a valuable fuel in some countries where wood and coal are scarce. Review of the Scientific Terms used in this lesson : Cilia. Dichotomous. Fugacious. Subulate. Species. III. THE POLYPOD FERN. Description. This comely Fern is found everywhere in old forests, growing on stony steeps, and covering the rocks and boulders with a matted turf composed of their tangled stems and roots. Analysis. We may conveniently divide this plant into two portions or regions ; first, that of the stem and root under ground (subterranean); second, that of the leaf and fruit above ground (aerial). The analysis will then proceed as before. The ffioot consists of a number of thread-like or hair- like fibers, branching into tiny fibrils, growing all along the stem. The Stem creeps about in the soil. It is many-branched, and covered with soft, narrow scales. As it never rises into the air it is properly a root-stock or rhizome.* * Plants with rhizomes are not uncommon. They are always perennial, i.e., living from year to year, and otherwise noted for their strong vitality. Those which have rhizomes long, slender, branching, are inclined to take exclusive possession of the soil, and so become in fields and gardens troublesome weeds. Such is the Polypod in Europe. On the contrary, in sandy sea-shores and dykes they are useful, binding the soil into a firm turf resisting the washing of the waves. See XTTI and LXV, POLYPODIUM. The Z