570 



INDEX 



Peniuin, 108 ; P. interruptum, 108, Fig. 



79. 



Pennatae, 90. 

 Pentaphyalaceae, 445. 

 Pentstemon, 453, 521. 

 Peperomia, 352, 354, 355, 356, 358, 359, 



363, 400, 401, 402, 406, 411, 413, 415; 



P. subrotunda, Figs. 378, 390; P. 



blanda, Fig. 390 ; P. pellucida, Fig. 



320 ; embryo-sac of, 355. 

 Pepper, 50, 366. 

 Pepsin e, 39. 



Perfect flower (see "Hermaphrodite"). 

 Perfoliate leaf, 25. 

 Perianth, 349, 350, 363. 

 Periblem, 360. 

 Pericarp, 367. 

 Pericycle, 256, 262. 

 Periderm, 328, 334, 408. 

 Peridineae, 84, 85, 86, 89, 90, 92, 111, 



134, 495, 497, 498; classification, 86; 



structure, 85. 

 Peridiniaceae, 86. 

 Peridiniales, 84. 



Peridinium, 85; P. divergens, Fig. 59. 

 Peridium, 186. 

 Perigynous flowers, 364. 

 Perinium (see also " Epispore"), 199, 264. 

 Periodicity of growth, 486. 

 Periodic movements (see " Movement"). 

 Perisperm, 359. 

 Perisporiales, 171. 

 Peristome, 234, 235, 236, 240. 

 Perithecium, 171, 172, 191. 

 Periwinkle (Vinca), 452. 

 Permian formations, 535. 

 Peronospora, 157 ; P. Schleideni, 158. 

 Peronosporineae, 155, 157. 

 Persimmon (see "Diospyros"). 

 Petal, 27, 32. 

 Petiole, 25. 



Petunia, 41, 453, Fig. 443. 

 Peziza, 64, 151, 167, Figs. 44, 132. 

 Pezizineae, 167, 168. 

 Phacelia, 453. 

 Phacoteae, 96. 

 Phacotus, 97. 

 Phaeophyceae (see also " Brown Algae ") 



92, 123, 125, 134, 137, 138,530; classifi- 

 cation, 134; structure, 125. 

 Phaeophyll, 123. 

 Phaeosporeae, 126, 129, 130, 134. 

 Phajus, 49, 397; P. grandifolius, Fig. 



32. 



Phallineae, 185, 186. 

 Phanerogams (see " Seed-plant," "Sper- 



matophyte "). 

 Phascum, 239. 



Phaseolus, 475, 492. 

 Phellogen, 334, 408. 

 Philadelphus, 431, 432- P. grandiflorus, 



Fig. 420. 

 Philodendron, 375, 389; P. melanochry- 



sum, 389. 



Phlox, 452, 453: P. divaricata, Fig. 442. 

 Phoenix: P. Canariensis, 57, 378, 386, 



387, 541, Figs. 38, 349, 361. 

 Phoradendron, 400, 421, 476; P. flaves- 



cens, Fig. 404. 

 Phosphorescence, 78. 

 Phosphorus, 7, 38. 

 Photosynthesis, 2, 3, 6, 7, 8, 13, 449, 472, 



473, 474, 475. 



Phryiuiueae, Phrymacese, 459. 

 Phycochromaceae (see " Schizophyceae ") . 

 Phycelis, 123. 

 Phycocyanin, 80, 81. 

 Phycoerythrin, 135, 472. 

 Phycomycetes, 149, 150, 151, 152. 

 Phycophaein, 123, 472. 

 Phycoxanthin, 81, 123. 

 Phylloclade, 24, 332, 377. 

 Phyllodia, 22, 503. 

 Phyllosiphon, 116, 151. 

 Phyllosiphonaceae, 116. 

 Phyllospadix, 348, 369, 382, 515. 

 Phyllotaxy, 409. 

 Phylogeny, 32, 66. 

 Phyxianthus albens, 523. 

 Physiological properties of Protoplasm, 



39. 



Physiology, 10. 

 Physiotium, 216. 

 Phytelephas, 372. 



Phyto-geography (see " Geographical dis- 

 tribution "). 



Phytolacca, 425; P. decandra, Fig. 409. 

 Phytolaccaceae, 443. 

 Phytomyxinae, 71. 



Phytophthora, 159 ; P. infestans, 158. 

 Picea, 337; P. orientalis, Fig. 300; P. 



excelsa, Fig. 301, 343; P. Sitchensis, 



344, 547. 



Pickerel-weed (see " Pontederia ") . 

 Pigments, 53, 77, 91, 151, 190, 480. 

 Pigweed (Amarantus), 155. 

 Pileus, 183. 

 Pilobolus, 160, 161, 162, 480, 511, Figs. 125, 



454 ; P. crystallinus, Fig. 125. 

 Pilularia, 48, 287, 288, 289, 291, 292, 475, 



Figs. 255, 257; P. Americana, Fig- 



257. 



Pinaceae, 338, 343, 535 ; fossil, 535. 

 Pine, Pinus, 22, 32, 48, 324, 333, 334, 335, 



336, 337, 338, 340, 341, 342, 343, 344, 511, 



Figs. 286, 296, 297, 298, 299, 300, 301, 



