INDEX 
Forestry, 139-142. 
Forked stems, 152. 
Formation, 316. 
Free, 218, 374. 
Free central placenta, 216. 
Free gills, 374. 
Free ovary, 218. 
Free veining, 402. 
Freezing, 33. 
Frog’s spit, 340. 
Frond, 402. 
Fruit, 282. 
Fruticose lichen, 384. 
Function, 41. 
Fungi, 333, 343, 344, 345, 346, 378. 
Fungus, 86, 364. 
Gametes, 394. 
Gametophyte, 394, 395, 396, 406, 407. 
410, 412, 414, 415, 416. 
Gemme, 387. 
Generative cell, 249, 416. 
Geophilous, 321. 
Geotropism, 51, 52, 53. 
Germ, 2, 11. 
Germ cell, 251, 414. 
Germination, 32, 35; Exps. 25, 26-29. 
Germs, 352, 355. 
Gills (of mushroom), 374. 
Girdling, 131. 
Glutin, 3. 
Gourd, 14, 290. 
Grain, 11, 297. 
Grain of timber, 133, 134, 135. 
Gravity, 52. 
Growth, 48-52, 179. 
Guard cell, 183. 
Gymnosperms, 15, 18, 117, 414. 
Gymnosporangium, Fig. 456. 
Halophyte, 317, 323. 
Haustoria, 85. 
Hay bacillus, 348, 349. 
Head, 161. 
Heartwood, 131. 
Heliotropic, 200. 
Heliotropism, 198. 
Herbaceous, 90, 94, 115, 116. 
Heredity, 264, 265. 
Hilum, 12, 13, 14. 
Homologous, 108. 
Host plant, 85. 
Humus, 75, 86. 
Hybrid, 256. 
Hybridization, 256, 257, 263. 
Hydrophytes, 317, 318, 319. 
Hymenium, 375. 
Hymenomyecetes, 375. 
Hyphe (sing, hypha), 369, 380. 
371 
Hypocotyl, 11, 12, 14, 46. 
arched, 42, 44. 
straight, 44. 
Hypogynous, 218, 225. 
Imbibition, 136. 
Imperfect flower, 219, 231, 267. 
Impure hybrid, 258, 259. 
In-breeding, 254. 
Incomplete flower, 219. 
Incubation, 354. 
Indefinite annual growth, 153. 
Indefinite inflorescence, 160, 161. 
Indefinite number of parts, 229. 
Indehiscent fruit, 283, 294. 
Indeterminate growth, 153. 
Indeterminate inflorescence, 160, 161. 
Indusium, 404. 
Inferior ovary, 221, 225. 
Inflorescence, 159. 
Insectivorous plants, 208-210. 
Internode, 46, 110; Exp. 35. 
Invasion, 328. 
Inverted seed, 14. 
Involucre, 161, 232. 
Involute, 373; Fig. 251. 
Iodine solution, Exp. 3. 
Irregular flower, 219, 237. 
Irritability, 201. 
Joint, 110, 113. 
Keel, 2388. 
Knots, 137. 
Lamina, 209. 
Lamine, 368, 374. 
Lateral, 372, 398. 
Lateral buds, 145. 
Leaf attachment, 167. 
Leaf cups, 202. 
Leaf scars, 146. 
Leaf traces, 146. 
Legume, 299. 
Lenticels, 106, 118, 288. 
Lichen, 379. 
Life cycle, 359, 364. 
Loam, 75. 
Lobing, 177; Figs. 210-212. 
Locule, 216. 
Loment, Fig. 394. 
Lyrate, Fig. 197. 
Medulla, 119, 122. 
Medullary rays, 64, 116, 121, 122, 134, 135. 
Megasporangia, 409. 
Megaspore, 409, 414. 
Mendel’s law, 258. 
Mesophyte, 317, 324, 
