[064 



INDEX 



Pnimis cerasus, 472, 1029 



Psalliota ; clamp connections, 321 



— • development of the sporophore, 322 



— spore discharge, 325 

 Psalliota campestris, 320 



— tabularis, 31 g 

 Psaronius, 826 

 Pseudaxis, 653 

 Pseudo-bulbs, 943 

 Pseudoelaters, 413 

 Pseudojuonas fliioresceiis, 350 



— putida, 349 



— savastanoi, 355 

 Pseudopodium, 189, 444 

 Pseudo-stipules, 992 

 Pseudovoltzia, 678 



— ■ liebeana, 6jg 

 Psilophytales, 948 

 Psilophyton, 634, 636 

 Psilopsida, 48, 50, 607, 649 

 Psilotales, 607 

 Psilotum, 830, 935 



— anatomy of stem, 61 1 



— development of embryo, 614 



of gametoph>i:e, 614 



of sporangium, 613 



Psilotum complanatiim, 608 



— ■ triquetrum, 608 

 Psychotria, 356 



— hirtella, 357 



Pteridium ; anatomy of the stem, 508 



— gametophyte, 510 



— sporangium, 510 



— structure of the petiole, 509 



of the root, 509 



Pteridium aquilinum, 503 

 Pteridophyta, 5, 33, 47- 5° 



— classification of, 479 

 Pteridospermae, 48, 638, 707 

 Pteris elata, var. karstetiiana, 563 



— podophylla, 565 



— serrulata, 511, 512 

 Pteropsida, 48, 50, 480, 649 

 Ptyxis, 970, 977 



Puccinia ; Biologic Races, 306 



— heterothallism, 296 



— life history, 295 



— sexual segregation, 301 

 Puccinia graminis, 295 



— poarum, sgg 

 Pulvinus, 1030 

 Punctum vegetationis, 846 

 Purple Bacteria, 346 

 Pycnidium, 296 

 Pycnospores, 296 

 Pycnoxylic wood, 658 

 Pylaiella, 1 1 3 



Pyrenocarpeae (Lichens), reproduction in, 



373 

 Pyrenoid, 16, 410 

 Pyrola, 827 

 Pyronema ; ascogenous hyphae, 263 



— ascogonium, 262 



— development of sex organs, 262 



— fertilization, 262 



— hymenium, 264 

 Pyronema confluens, 261, 337 



— omphalodes, 261 

 Pyrus, g55 



Pyrus malus, 841, 930, 1001 



Pythiopsis, 210 



Pythium ; asexual reproduction, 223 



— sexual reproduction, 225 

 Pythium deharyanuni, 222 



— gracile, 233, 234 



— intermedium, 233, 234 



— t?iamillatum, 226 



— proliferuni, 226 



— ultimum, 234, 235 

 ■ — vexans, 234, 235 



Ouercus, g^i 



— pedunculata, 834 



— robur, goo, 971 

 Quilhvort, 592 



Rachis, 483, 950 

 Radial symmetry, 837 

 — • traces, 716 

 Radical leaves, 957 

 Radish, 812 



Ramalina scopulorum, 375 

 Ramenta, 483, 485 

 Ramie, 899 



Ranunculaceae, 993, 1023 

 Ranunculus, 856 



— bulbosus, 940 



— flammula, 880 



— fluitans, 4jg 



— lingua, 880 



— repens, 792, g32 

 Raphia taedigera, 956 

 Raphides, 476 

 Raunkaier, 954 



Ray fields, 665 



— Fungi, 348 



Ray, John, 42, 43, 379 



Rayer, 351 



Recapitulation, 565 



Receptacle, 517 



Reduction division, 29 



Reed, -93 1 



Rees, 365 



Reindeer Moss, 374 



Relative sexuality, 113 



Relic coils, 20 



Reparative buds, 1045 



Repeated concentric rings of bundles, 921 



Reproduction, asexual and sexual, 28 



Residual meristem, 854 



Resin canal, 665, 668, 672 



Resting nucleus, 19 



Resupinate sporophore in Alerulius, 317 



Resupination, 968 



Reticularia lycoperdon, 192 



Reticulum, 18 



Retinospora, 963 



Rheum officinale, 921 



Rhizinae, 372 



Rhizobiutn, 355 



— leguminosarutn, 359 



— trifolii on Trifolium repens, 360 

 Rhizome, 832, 933 

 Rhizomorphic droppers, 936 

 Rhizomorphs, 320, 334 



