INDEX 



649 



amphigastria (leaves), 102 

 antheridium, 105, 106 



apical growth, 102, 103 



archegonia, 107, ib8 



branching, 101 



embryo, 109 



perianth, 109 



sex-organs, 104 



spermatozoids, 107 



spores, in 



sporophyte, no 

 Bolanderi, 101 ; Figs. 49, 50, 52, 



53, 57 



platyphylla, 101 

 pores, 40, 48 



Fimbriaria Californica; Fig. n 



Kaulfussia, 299 



Marchantiaceae, 42 



receptacle, 59 

 Preissia, 14, 44, 58, 59, 61, 70 



sclerenchyma, 44 

 commutata, 54 

 primary root, 326, 492 



Azolla, 406 



Onoclea, 325 



Osmunda, 359 

 primary stele, 



structure (Polypodiacese), 327 

 primary tubercle, 236, 486 

 prismatic layer, 554 

 prosenchyma, 173 

 prothallium, 4, 5, 6 



Alsophila, 391 



ameristic, 314 



apical growth, 314, 318 



branching, 277, 374 



dichotomy, 452 



dicecism, 453 



(female) Azolla, 400, 401, 402 



(female) Marsiliaceae, 422 



(female) Pilularia, 424 



Marattiaceae, 275, 285 



Onoclea, 314 



Ophioglossum pedunculosum, 

 236 



Ophioglossum pendulum, 235 



primary, 534 



Salvinia, 403 



secondary, 534 

 prothallus, 



dichotomy, 350 



male, 349 



Protocalamariaceae, 586, 588 

 Protocephalozia, 74 

 ephemeroides, 116 

 protocorm, 491, 492, 503, 599 

 protonema, 2, 3, 8, 12, 13, 20, 37, 

 74, 114, 115, 116, 1.61, 162, 163, 168, 

 182, 183, 188, 189, 214, 216, 219, 

 226, 227, 570, 594 

 protonemal filaments, 



secondary, 226 

 protophylls, 600 

 protostele, 327, 464 

 protoxylem, 244, 337 

 Psaronius (tree-ferns), 581 

 pseudoperianth, 65 

 pseudopodium, 180, 182 

 pseudo-veins, 381 

 Psilophyton, 591 



Psilotaceae, 485, 504, 511, ^33, 535, 

 5Qi, 601 



affinities, 510 



sporangium, 508, 509 



spores, 510 



vascular bundles, 507 

 Psilotites, 535, 591 

 Psilotum, 231, 485, 504, 507, 510, 587 



gemmae, 504 



rhizome, 505 



structure, 506 

 triquetrum, 504; Figs. 291, 292, 



293 



Pteridophytes, I, 3, 14, 120, 121, 157, 

 159, 229, 572, 594 



archegonium, 232, 596 



fossil, 578 



gametophyte, 230, 597, 603 



homosporous, 7 



relation to Bryophytes, 574 



sporangium, 598 



spore-formation, 232 



sporophyte, 595 



strobiloid, 598 

 Pteridospermae, 585 

 Pteris, 395 



medullary steles, 328 



