572 



INDEX 



Poppy. 59, 429. 



Porphyra, 135, 138 ; P. vulgaris, Fig. 107. 



Portulaca, 155, 423, 517 ; P. oleracea, 155. 



Portulacinese, Portulacacese, 443. 



Postelsia, 124, 126, 128, 497, Fig. 99; P. 

 palmseformis, PI. II, PI. VIII. 



Potamogetonaceaj, 383. 



Potamogeton, 374, 381, 383, 539, Fig. 354; 

 P. natans, 331. 



Potassium, 38, 478. 



Potato, 54, 361. 



Potato-fungus (see " Phytophthora ") . 



Pothos, 375. 



Prickles, 29. 



Prickly-pear (Opuntia), 24, 440. 



Primula, 450, 519, 525; P. polyantha, 

 Fig. 488. 



Primulaceae, 448, 450, 458. 



Primulales, 449, 450, 458. 



Principes, 381. 



Pritchardia (see " Washingtonia ") . 



Procambium, 254, 298. 



Procarp, 137, 142, 143, 173. 



Pro-embryo (Characea?), 119, 122. 



Promycelium, 178. 



Pronuba, agent in pollination, 524. 



Properties of soil, 468. 



Prophases, 61, 63. 



Prorocentracea?, 86. 



Prosenchyma, 57. 



Protea, 420, 421 ; P. cynaroides, Fig. 403. 



Proteales, 414, 420. 



Proteaceaj, 420. 



Protective tissues, 58. 



Proteids, 38, 478. 



Protein, 59, 257. 



Protein crystals, 55. 



Proterandry, 516. 



Proterogyny, 516. 



Prothallium (see also "Gametophyte"), 

 241. 



Protista, 67. 



Protobasidiomycetes, 175. 



Protocephalozia, 202. 



Protococcaceae, 116. 



Protococcoideae (Protococcaceae), 94, 96, 

 97, 98, 99, 100, 101, 104, 111, 188 ; classi- 

 fication, 100. 



Protodiscineae, 166. 



Protomyces, 164. 



Protonema, 16, 122, 202, 223, 225, 278. 



Protophyte, 92. 



Protoplasm, 2, 3, 6, 7, 8, 12, 34, 35, 36, 37, 

 38, 41, 45, 97, 136, 465; movements 

 of, 41 ; physiological properties, 34 ; 

 structure, 35. 



Protoplast, 34, 35, 36. 



Protoxylem, 257, 313. 



Protozoa, 68. 



Primus, 432; P. cera/nts, Fig. 422. 



Psalliota (see also "Mushroom"), 182, 



184 ; P. campestris, Figs. 148, 183. 

 Pseudo-bulbs, 396. 

 Pseudocarp, 419. 

 Pseudo-fruits, 381. 

 Pseudopodium, 37, 238. 

 Pseudotsuga, 343, 344 ; P. Douglasii, Fig. 



309. 



Psilotineae, 304, 319. 

 Psilotum, 23, 303, 309, 310 ; P. triquetrum, 



Fig. 275. 

 Pteridium : P. aquilinum, 246, 25(5, 280, 



Figs. 220, 247. 

 Ptericlophyta, Pteridophyte (see also 



"Ferns"), 200, 220, 241, 282, 322, 



325, 326, 349, 352, 358, 372, 466, 531, 



532, 533, 537, 539; fossil P., 531, 532, 



533, 537, 539. 



Pteris Cretica, 261, Fig. 226. 



Pteromonas, 97. 



Ptilidioideae, 219. 



Ptomaines, 480. 



Puccinia, 172, 177, 179; P. aurea, 177, Fig. 



143; P. graminis, 179; P. Malvacea- 



rum, Fig. 143; P. rubigo-vera, 179. 

 Puffball (see also " Lycoperdon "), 162, 



163, 174, 180, 187. 

 Pulvinus, 486, 487. 

 Pumpkin, 50, 368. 

 Punica, 441, Fig. 436. 

 Punicaceae, 441, 447. 

 Pycnidia, 173, 176, 191. 

 Pylaiella, 126. 



Pyrenoid, 14, 49, 95, 108, 109, Fig. 3. 

 Pyrenolichenes, 192. 

 Pyrenomycetes, 170. 

 Pyrenopeziza, 167. 

 Pyrocystis, 85, 89; P. noctiluca, P. 



lunula, 85, Fig. 59. 

 Pyrola, 539. 

 Pyrolaceas, 450, 457. 

 Pyronema, 163, 164, 167, 168, 191; P. 



confluens, Figs. 127, 133. 

 Pyrus, 424, 432 ; P. mains, Fig. 422. 

 Pythium : P. De Baryanum, 154. 



Quadripolar spindle (spores of Junger- 



manniales), 214. 

 Quercus (see also "Oak"), 25, 367, 409, 



411, 417, 418, 537, 530 Q. agrifolia, 



Figs. 19, 400, PI. X. ; Q. lobata, Fig. 



17; Q. macrocarpa, Fig. 335; Q. suber, 



409. 



Raceme, 366. 



Racemose inflorescence, 366. 



