CONTENTS. VII 



Page 

 V. Mosses ..... . 174 



b. Agamic Plants, having Roots. 

 Vf. Club-mosses (Lycopodiaceae) . . . .189 



VII. Ferns (Filices) 192 



VIII. The Horse-tails (Equisetacea?) . . . .198 

 B. Sexual Plants . . . 201 



a. Plantae athalamicae. 



IX. Rhizocarpeae . ... 203 



b. Plantae thalamicae. 



X., XI. Monocotyledons and Dicotyledons . . . .213 



A. Radical Organs. 



a. True Root (Radix) . . .217 



b. Adventitious Root (Radix adventitia) . .218 



B. Axial Organs. 



a. The main Axis (Axis primarius) . . .221 



b. Varieties of Direction .... 232 



c. Of the Secondary Axis , ... 233 



d. Of the Structure of Axes . . . 235 



e. Review of Axial Structures and Terminology . 258 



C. Foliar Organs. 



a. Foliar Organs in general . . . .261 



b. Structural Condition of the Foliar Organs . 276 



c. Complete Review of the Foliar Organs . . 280 



D. Bud-Organs (Gemmae). 



a. Of the Buds in general . . . .281 



b. Structure of the Bud .... 286 



c. Of the particular Forms of Buds . . . 289 



E. The Flowers . . . . . .296 



I. The Inflorescence .... 300 



II. Of the Parts of Flowers at the Time of Blooming 310 



A. On the Axial Organs of the Flower . 318 



B. Number, relative Position, and Duration of 



the Parts of the Flower . . . 324 



C. Of the true Foliar Organs of the Flower. 



a. Of the Floral Envelopes . . 330 



b. Of the Stamens .... 345 



c. Of the Accessory Foliar Organs of the 



Flower . 364 



D. The Rudiments of the Fruit . . 367 



a. Of the Pistil . . . .368 



b. Of the Spermophore (Placenta) . . 382 



d. Of the Seed-bud (Ovule) . . 389 



III. Of the Transformation and Development of the 



Parts of Flowers into the Fruit . . 402 



A. The Change of Place and Development of 



the Pollen into the Embryonal Globule . 402 



B. The Development of the Embryonal Globule 



into the Embryo . . .416 



C. Development of the Germen and Seed-bud 



to Fruit and Seed . . . 423 



D. Phenomena exhibited in the remaining Part 



of the Flower, during the Formation of 

 Fruit and- Seed .... 436 



IV. Of the Fruit and the Seed . . . 437 



I. Of the individual Parts of the Fruit . 440 



II. Of the accessory Organs of the Fruit . 446 



III. Enumeration of the various Forms of the Fruit 447 



