INDEX 



397 



Oak, quartered, 126. 



Oats, temperature effect ou growth, 

 158. 



CEdema, 234, 368. 



Offsets, 188, 189. 



Oil, Castor, 104 ; Cottonseed, 104 ; 

 Linseed, 104; Olive, 104. 



Orchid, pollination, 293 ; seeds, 

 372. 



Osmoscope, 227, 228. 



Osmosis, danger, 234 ; described, 

 227, 232; explanation, 230; uses 

 in plants, 233. 



Osmotic, phenomena, common, 23.5 ; 

 pressure in growth, 233 ; pres- 

 sures, 229 ; processes, described, 

 232. 



Outgrowths from petals, 334. 



Ovarian wall, 3.51. 



Ovary, of Buckeye, 350 ; compart- 

 ments, 349 ; compound, 273 ; 

 described, 274 ; inferior, 275 ; 

 simple, 273 ; superior, 275 ; union 

 of carpels, 323. 



Ovule, 273, 323; described, 274; 

 forms, 272 ; to seed, 354 ; struc- 

 ture, 271, 277. 



Oxygen, release by plants, 23. 



Paleobotany, 3. 



Palisade tissue, 30. 



Palm, 60, 127, 136. 



Palmate venation, 66. 



Pandanus, 253. 



Panicle, 337. 



Pansy seed, 376. 



Paper, 205. 



Parasite, 9, 11, 83 : damage, 85. 



Parasitic Fungi, 367. 



Parrish, 18. 



Parthenocarpy, 354. 



Parthenogenesis, 302. 



Pasteur, 39. 



Pathologjf, 4, 367. 



Peach Yellows, 369. 



Pearson Fern, 197. 



Peat, 241. 



Pectin, 103. 



Pedicel, 193. 



Peduncle, 193. 



Peg, of Pumpkin, 382. 



Pepsin, 110. 



Peptone, 105. 



Perennials, 114; herbaceous, 114; 

 woody, 114. 



Perfumes, 108. 



Perianth, 333. 



Periblem, 264. 



Pericycle, 265. 



Permeable membrane, 228, 235. 



Petal, 270 ; outgrowths, 334. 



Petiole, 16. 



Phanerogams, 12. 



Pharmacologic 4. 



Phenotypioally, 310. 



Phloem, 122, 130, 222, 262. 



Phosphates, 242. 



Photosynthesis, 262 ; amount, 25 ; 

 definition, 21 ; v-^. respiration, 169. 



Photosynthetic equation, 23. 



Photosynthometer, 24. 



Phototropic response, nature, 56. 



Phototropism, 54, 296 ; in Fuchsia, 

 55. 



Phyllodia, 80, 81. 



PhyUomania, 203. 



Phyllotaxy, 328 ; described, 139 ; 

 origin, 143. 



Physiological disturbances, 368. 



Physiology, 3, 5. 



Phytopathology, 4, 367. 



Pigments, 108. 



PinB, cross section, 147 ; radial sec- 

 tion, 148 ; stem. 126 ; tangential 

 section, 149. 



Pineapple, fasciated, 198. 



Pinnate venation, 66. 



Pistil, 273 ; generalized, 278. 



Pistillate flower, 276, 285. 



Pitcher Plant, 75, 76, 203. 



Pitchers, 9, 74. 



Pith, 116, 132, 265. 



Placenta, 275, 323, 347, 351 ; dia- 

 gram, 324. 



Plant, adult, 9 ; breeding, 4, 371 ; 

 breeding, methods, 317 ; definition, 

 7 ; diversity, 5 ; food, use of term, 

 28 ; foods, 242 ; geography, 4 ; 

 Industry, 4 ; insect catching, 87 ; 

 primary parts, 7 ; skeleton, 98 ; 

 spraying, 97 ; transplanting, 97. 



Plants, numbers, 1. 



Plastid, 41. 



Platycerium , 186. 



Plerome, 264. 



Plowing, 260. 



