INDEX 623 



Pruniis oriiDii (Wild Cherry), 340, 342, 



343 

 P. domestica etc. (Plum), iii, 242, 



258, 454 

 P. lanrocerasus (Cherry-laurel), 343 

 P. persica (Peach), iii, 113, 242, 



Psalliota, see Agariciis compcstris 

 Psammon, 495 



Psammosere, 324, 328, 371, 407 

 Pseudo-endemic, 206 



— -relic (relict), 200 

 Pseiidobornia, 145 



Pseudotsuga taxifolia (Douglas Fir), 243, 



246, 29s, 348, 376, 574 

 Psilophyta, 135 

 Psilophytales, 145, 146 

 Psilophytineae, 133, 134, 135, 138 

 Psilophytinean complex, 137, 146 



Psilophytou priiiceps, 134 

 Psilopsida, 135, 145, 146 

 Psilotales, 145 

 Psilotum, 135 



P. triquetrum, 134 

 Psychrometer, 289 

 Psyllium, 263 

 Ptarmigan, 116 

 Pteridium (Bracken), 466 



P. aqidlimim agg. (Bracken), 62, 204, 



249. 348 

 Pteridophyta (Pteridophytes), 24, 55- 



62, 129, 133. 143. 145, 146, 149, 



172, 349. 527 

 — , epiphytic, 432 

 — , fossil, 133, 134, 135. 136, 137, 138, 



146, 148, 149 



— , industrial use of, 264 

 Pteridophytes, see Pteridophyta 

 Pteridospermae (Pteridosperms, Seed- 

 ferns), 138, 139, 141, 144, 145, 146, 



147. 148, 149 

 Pteris longifoha, 61 



Pterocarpus indicus (Burmese Rose- 

 wood), 247 



Ptilota pectinata, 537 



PuccineUia (Alkali-grass), 369, 399 



P. phryganodes agg. (Creeping Alkali- 

 grass), 109, 399, 400 



PufFball, see Lycoperdon 



Pulp, 3, 239 



Pumpkin {see also Cucurbits), 217, 258 



Punas, 413, 414, 470 



Pure-stand forestry, 574 



Purgative, 263 



Purple Bacteria, 27 



— Saxifrage, see Saxifraga oppositifolia 



agg. 



barren, 402, 403 



Pyorrhoea, treatment of, 264 

 Pyrenees, 156 

 Pvrethrum, 276 



Pyrtis communis (Pear), 242, 258, 261 

 P. mains (Apple, Crab Apple), 80, 

 112, 242, 258, 261, 272, 282, 340 



Quadrat, 366, 452, 453, 567, 568 



Quail, 1 12 



Quaking bog, 501 



Quarantine, 251, 576 



Quassia, 264 



Quaternary period, 129, 151, 155, 168 



— {see also Pleistocene), glaciation, 156 

 Quebec, 393, 401 



Quebracho, 274 

 Queen Maud Mountains, 419 

 Quercetum, 334 

 Quercitron, 274 



Qiiercus (Oak, see also Aleppo Oak, 

 Turkish Oak), 68, 98, 173, 174, 



246, 268, 274, 295, 334, 341, 343, 

 351, 355 



^, evergreen, 351, 352, 354, 355, 357 



— fruit (acorn), 258 



Quercus alba (White Oak), 341 



Q. ilex (Holm Oak), 355 



Q. montaua (Chestnut Oak), 341 



Q. nigra (Black Oak), 160 



Q. petraea {Q. sessiliflora, Sessile 



Oak), 340 

 O. robur (Pedunculate Oak), 340, 541 

 Q. rubra s.l. (Red Oak), 341 

 Q. suber (Cork Oak), 279, 355 

 Q. virginiana (Live Oak), 352 



Quillwort, see Isoetes 



Quillworts, see Lycopodineae 



Quince, 258 



Quinine, 264 



Quinoa, 257 



Rabbits, 112, 306, 363 

 — , regeneration of Beech and, 306 

 Radiation, 10 

 Radish, 258 

 Rafflesia arnoldii, 437 

 R. manillana, 437 

 Rafting, 109 

 Ragweed, see Ambrosia 

 Railways, migration along, 119 

 Rain, see Precipitation 



— forest {see also Tropical rain forest. 



Warm-temperate rain forest), 11, 



247, 352, 354, 424, 426, 427. 429» 

 467, 468, 469 



, epiphytes of, 351-2, 353, 431-5 



— gauge, 289 



shadow of mountains, 160, 376 



Rainfall, see Precipitation 

 Rainwash, dispersal by, 107, 108, 124 

 Raised beach, 396 



— bog, 373, 501 

 Ramaley, F., 281 

 Ramie, see Boehmeria nivea 



