INDEX 



701 



214, 216, 219, 226, 227, 570, 

 594, 623 

 Protophyll, 600 

 Protostele, 327, 464 

 Protoxylem, 244, 337 

 Psaronius, 581 

 Pseudoperianth, 65 

 Pseudopodium, 180, 182 

 Pseudo-veins, 381 

 Psilophyton, 591 



Psilolaceae, 485, 504, 510, 533, 535, 

 591, 601, 638 



affinities, 510 



sporangium, 508, 509 



spores, 510 



vascular bundles, 507 

 Psilotales, 639, 640 

 Psilotites, 535, 591 

 Psilotum, 231, 485, 504, 507, 510, 



587 

 gemmae, 504 



rhizome, 505 

 structure, 506 

 flaccidum, 640 



triquetrum, 504, 640; Figs. 291, 

 292, 293 

 Pteridophytes, i, 3, 14, 120, 121, 

 157, 159, 229, 572, 594 

 archegonium, 232, 596 

 fossil, 576 



gametophyte, 230, 597, 603 

 homosporous, 7 

 relation to Bryophytes, 574 

 sporangium, 598 

 spore-formation, 232 

 sporophyte, 595 

 strobiloid, 598 

 Pteridospermeae, 585 

 Pteris, 395 



medullary steles, 328 

 aquilina, 305, 309, 394; Fig. 231 

 Cretica, 308, 309, 336, 570; Figs. 

 171, 187 

 Ptilidiaceae, 620 

 Ptilidioideae, 119 



Ptychocarpus, 582 

 Pulvinus, 292 

 Pyrenoid, 13, 121 

 Pythium, 239, 487 



Quadrant wall, 322 

 Quadripolar spindle, 98 



Radula, in, 112, 114, 183; Fig. 59 

 Radulaceae, 620 

 Reboulia, 42, 56, 58 



hemisphaerica. Fig. 20 

 Reduction of chromosomes, 343, 



477, 567 

 Regeneration, 570 



Marchantiaceae, 69 

 Renaultia, 583 

 Resting spore, 563, 567 

 Rhacopteris, 582 

 Rhizocarpeae, 234, 396, (see also 



Hydropterides) 

 Rhizogenic buds, 470 

 Rhizoids, 14, 19, 20, 27, 37, 39, 

 66, 67, 69, 72, 86, 102, 121, 

 123, 144, 160, 161, 162, 168, 

 170, 182, 183, 188, 190, 194, 

 221, 230, 276, 314, 347, 374, 

 564, 565, 566, 569, 575 

 Bryales, 188 

 Danaea, 277 

 Marchantiaceae, 42, 70 

 Marchantiales, 23 

 Muscineae, 9 

 Riccia, 28 

 Rhizome 



Psilotum, 505 

 Struthiopteris, 329 

 Rhizophore, 522 

 Rhodea, 579 

 Rhodophyceae, 562 

 Rhyncostegium murale, 160 

 Riccia, 12, 14, 15, 18, 21, 24, 42, 46, 

 47, 49, 50, 53, 54, 55, 59^ 60, 

 66, 67, 71, 76, 77, 78, 81, 90, 

 157, 158, 563, 566, 567, 592, 

 596 



