372 INDEX 
Metabolism, 193. 
Microbe, 351, 355. 
Micrococcus, 339. 
Micropyle, 12, 13, 14, 15, 45. 
Microsporangia, 409. 
Microspore, 409, 414. 
Midrib, 172. 
Mixed forest, 139, 324.. 
Modification,100-108, 206, 207, 289. 
Molecule, 136. 
Monadelphous, 239. 
Monocotyl, 110, 112, 171, 217, 221, 418. 
Monocotyledonous, 11. 
Moncecious, 268. 
Monopetalous, 211. 
Monosepalous, 211. 
Morphology, 108. 
of the flower, 244, 
Mosaic (leaf), 197. 
Mosses, 334, 396-401. 
Muck, 75. 
Multiple fruit, 304, 305. 
Mushroom, 333, 367. 
Mutation, 264. 
Mycelium, 343, 359, 369. 
Mychorrhiza, 86. 
Neck canal, 391. 
Net-veined, 171. 
Neuter, 267. 
Neutral flower, 231, 267. 
Nitrogen, 62, 63, 188. 
Nitrogenous food, 188. 
Node, 46, 65, 110, 113. 
Nucleus, 7, 341. 
Numerical plan, 217, 229. 
Nut, 295. 
Nutriment, 3, 186. 
Nutrition, 50, 54, 179, 193. 
Nyctitropic, 200. 
Obsolete, 220. 
Oil, 1, 8, 8. 
Oéspore, 393, 394, 395. 
Open bundle, 116. 
Operculum, 399. 
Opposite leaves, 168. 
Organ, 41. 
Organic foods, 4. 
Organs of reproduction, 40. 
of vegetation, 40. 
Osmosis, 56, 57. 
Ovary, 214, 216, 223. 
Ovule, 216. 
Oxidation, 27; Exps. 21, 22. 
Oxygen, 62, 63, 186, 187; Exps. 22, 66. 
Palisade cells, 184. 
Palmate veining, 172. 
Panicle, Fig. 171. 
Papilionaceous, 237, 238. 
Pappus, 234. 
Parallel veining, 171. 
Paraphyses, 375, 398. 
Parasitic, 5, 345, 364. 
Parasitic plants, 85, 343, 382. 
Parenchyma, 110, 114, 115. 
Parietal, 216. 
Pathogenic, 352, 353. 
Pedicel, 159. 
Peduncle, 159, 288. 
Pentamerous, 229. 
Pepo, 290. 
Perennial, 93. 
Perfect flower, 219. 
Perianth, 211. 
Pericarp, 288. 
Perigynous, Figs. 301, 302. 
Persistent, 166. 
Petals, 211. 
Petiole, 165. 
Phanerogams, 331, 332. 
Phloem, 114, 116. 
Photosynthesis, 186, 192, 193. 
Phototropism, 195. 
Phyllotaxy, 168, 169. 
Pileus, 373. 
Pinna, 402. 
Pinnate veining, 172. 
Pinnule, 402. 
Pioneer plant, 316, 319, 320. 
Pistil, 212, 214, 223, 228, 240. 
Pistillate, 267. 
Pitcher plant, 209. 
Pith, 110, 115, 116, 119, 121, 122. 
Pitted ducts, 114. 
Placenta, 216, 288, 298, 300. 
Plant society, 316. 
Plasmolysis, 59. 
Pleurococcus, 337. 
Plicate, 155. 
Plumule, 11, 12, 14, 45, 46, 
Pod, 298. 
Pollen, 213. 
Pollen grains, 213. 
Pollen sac, 213. 
Pollen tubes, 249, 250. 
Pollination, 215, 247. 
Polycotyledons, 15, 45. 
Polymorphic, 365. 
Polymorphism, 365. 
Polypetalous, 211. 
Polysepalous, 211. 
Pome, 288. 
Prefoliation, 155. 
Primary, 396. 
Primary root, 42, 79, 
Pronuba, 278, 
