704 



INDEX 



Silica, 467, 576 

 Silurian, 578, 588, 591 

 Simplices, 311 

 Siphoneae, 577 

 Siphonostele, 327, 464, 465 

 Sorophore, 389 

 Sorus, 339, 395 

 Spencerites, 590 

 Spermatid, 17, 51, 52 

 Spermatocyte, 608 

 Spermatophytes, 4, 7, 262, 482, 

 534, 561, 574, 579, 603, 604, 

 606 

 Spermatozoids, 2, 10, 11, 32, 51, 81, 

 131, 197, 199, 232, 278, 316, 

 398, 420, 421, 450, 482, 539, 

 560, 598, 601 



Botrychium, 240 



Cycads, 604 



Equisetum, 449, 637 



Gingko, 604 



Hepaticae, 17, 608, 609 



Jungermanniales, 73 



Lycopodium, 489 



Makinoa, 92 



Marattia, 279 ' 



Marchantia, 52 



Marchantia polymorpha, 51 



Marsilia, 421 



Onoclea, 317 



Ophioglossimi, 625, 626 



Osmunda, 3 53 



Pallia, 17, 92 



Porella, 107, 619 



Psilotaceae, 640 



Salvinia, 398 



Selaginella, 513 

 Sphaerocarpales, 609, 613, 614, 621 

 Sphaerocarpus, 12, 15, 16, 17, 18, 



73, 75, 83, 90, 92, 94, 151, 

 157, 158, 159, 596, 614, 615, 

 619; Figs. 30, 31, 32, 33 



Californicus, 75, 615; Fig. 30 



cristatus, 75, 82 



hians, 615 



Sphaerocarpus — Cont. 



terrestris, 75, 80, 81, 82, 615 

 Texanus, 615 

 Sphagnaceae, 156, 161, 165, 184, 



228, 594 

 Sphagnales, 160, 166, 181 

 Sphagnum, 160, 161, 162, 164, 165, 

 179, 180, 182, 183, 184, 185, 

 188, 190, 191, 194, 199, 200, 

 203, 209, 218, 219, 226, 227, 

 594, 595, 607, 622 

 antheridia, 175, 176 

 apical growth, 1 70 

 archegonium, 177, 178, 181, 



607, 622 

 branching, 167, 173, 1 74 

 embryo, 178 

 germination, 168 

 leaf, 167, 168, 169, 172 

 sex-organs, 174 

 spermatozoids, 176 

 stem-structure, 172, 173 

 acutifolium, 178; Figs. 19, 92, 93 

 cymbifolium, 173, 622; Figs. 89, 



90, 91 . . , 



squarrosum; Fig. 88 

 Sphenophyllaceae, 481, 588, 601 

 Sphenophyllales, 587, 639, 640 

 Sphenophyllum, 512, 587 

 Splachnum, 220, 229, 600 

 Sporangiogenic band, 254 

 Sporangiophore, 250, 251, 258, 261, 

 271, 508, 599 

 Botrychium, 259 

 Helminthostachys, 272 

 Psilotaceae, 508 

 Sporangium, 4, 7, 271, 272, 273, 303, 

 304, 307, 389, 412, 472, 473, 



475, 479, 500, 524, 530, 531, 

 534, 556, 557, 584, 600, 641 



Botrychium, 268, 269 



Cyatheaceae, 392 



dehiscence, 257, 270, 297, 344, 



444 

 eusporangiate, 232 



