598 



INDEX 



Penicillium glaucum, 458. 



Pepsin, 110. 



Peptone, 105. 



Perennials, 114; herbaceous, 114; 



woody, 114. 

 Perfumes, 108. 

 Perianth, 333, 528. 

 Periblem, 264. 

 Pericycle, 265. 



Peridinece, 411 ; described, 412. 

 Peridium, 475. 

 Peristome, 489. 

 Perithecium, 448. 

 Permeable membrane, 228, 235. 

 Peronosporales, described, 436. 

 Petal, 270 ; outgrowths, 334. 

 Petiole, 16. 



Peziza aurantiaca, 450. 

 Phceophycece, described, 439. 

 Phceosporales, described, 440. 

 Phallus impudicus, 476. 

 Phanerogamia, 12, 492, 512. 

 Pharmacology, 4. 

 Phloem, 122, 130, 222, 262. 

 Phosphates, 242. 

 Phosphorescence, 412. 

 Phosphorescent Wood, 473. 

 Photosynthesis, 262 ; amount, 25 ; 



definition, 21 ; vs. respiration, 169. 

 Photosynthetic equation, 23. 

 Photosynthometer, 24. 

 Phototropic response, nature, 56. 

 Phototropism, 54, 296 ; in Fuchsia, 



55. 

 Phycocyanin, 401. 

 Phycoerythrin, 445. 

 Phycomycetes, described, 434. 

 Phyllodia, 80, 81. 

 Phyllomania, 203. 

 Phyllotaxy, 328; described, 139; 



origin, 143. 

 Phylogenetic tree, 393, 394. 

 Physcia stellaris, 460. 

 Physiological, disturbances, 368 ; 



dryness, 567. 

 Physiology, 3, 5. 

 Phytopathology, 4, 367. 

 Phytophthora infestans, 437. 

 Pigments, 108. 

 Pilobolus, 439. 

 Pine Blister Rust, 468. 

 Pine, cross section, 147 ; life cycle, 



521 ; radial section, 143 ; stem, 



126; tangential section, 149. 



Pineapple, fasciated, 198. 



Pinguicula, 579. 



Pinnate venation, 66. 



Pinus rigida, 521. 



Piperales, described, 541. 



Pistil, 273 ; generalized, 278. 



Pistillate flower, 276, 285. 



Pitcher Plant, 75, 76, 203, 547, 579. 



Pitchers, 9, 74. 



Pith, 116, 132, 265. 



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

 gram, 324. 



Plains, 585. 



Plankton Formations, 586. 



Plant, adult, 9 ; Associations, 579 ; 

 breeding, 4, 371 ; definition, 7 j 

 diversity, 5 ; food, use of term, 

 28 ; foods, 242 ; Formations, 579 ; 

 geography, 4 ; Habitats, 559 ; In- 

 dustry, 4 ; insect catching, 87 ; 

 primary parts, 7; skeleton, 98; 

 spraying, 97 ; transplanting, 97. 



Plantaginales, described, 556. 



Plants, classification of, 395 ; num- 

 bers, 1. 



Plasmodium, 39, 412, 413, 414. 



Plasmopara, 437. 



Plastid, 41. 



Platycerium, 186, 498, 577. 



Plectascales, described, 456. 



Plerome, 264. 



Pleurococcus, 299, 417, 563. 



Plowing, 260. 



Plowrightia morbosa, 452. 



Plume, 358. 



Plumule, 374. 



Pneumococcus, 406. 



Podostemonacece, 548. 



Poisonous Fungi, 472. 



Pollen, 272; germination, 275, 276; 

 grains, 286 ; injured by water, 295. 



Pollination, 277, 370. 



Polster, 547. 



Polyadelphous, 272. 



Polycotyledony, 377. 



Polyembryony, 302, 377. 



Polygonales, described, 544. 



Polypetalce, 545. 



Polypetalous, 271. 



Polyporus, 474 ; betulinus, 473. 



Polysepalous, 270, 330. 

 Polysiphonia, 447, 509 ; violacea, 

 446. 

 I Polytrichum, 488. 



