IxNDEX 



341 



Psaronius bi-asiliensis, stem of, 105 (Fig. 

 399) 

 P. Renaulli^ stem of, 107 (Fig. 401) 

 Pferidotheca, 151 

 Pteroids, 2,'}^'^ 



PtychocarpHs, 125; synangial sori of, no 

 P. tifiitits, 6 ; fructification of, 115 (Fig. 

 407); synangia of, 115 (Fig. 407) 

 PtycJiopteris^ 104 



Rachis o{ Etapteris Scotti, 27 (Fig. 327) 

 Ramifications oi Diplolabis Rbnieri, 19 (Fig. 



320); oi Stcwropteris^ 30 (Fig. 331) 

 "Ramular gap," 135 

 "Raphe" of the sporocarp oi Marsileaqitad- 



rifolia, 189 (Fig. 469) 

 Rcgncllidiuin, 176, 192; habit of. 178 (Fig. 



460) 

 Rhizome of CIiriste?iscnia, 96 (Fig. 390); 



oi Gleicheiiia flabcllata, 197 (Fig. 478); 



of HelDiinthostachys, 49; of H. ztylaiii- 



ca, 46 (Fig. 339); of Lygodium, 158 



(Fig. 442); of Z. scandens, 153 (Fig. 



436) ; of Metaclepsydropsis, 22 ; of 



Pilulm-ia globiilifera, 177 (Fig. 458); 



(transverse section) of Platyzoma, 201 



(Fig. 483); of Thyrsopteris ele<rans, 262 



(Fig. 528) 

 Rhynie Flora, 5 

 Root apices of, 2; of BotrychiiDii, 55; of 



Heliinnthostachys^ 55; oi Ophioo/ossuin, 



55; of C. BergianuDi^ 56 

 Root-tip of Osmt(?ida ree^alis, 133 (Fig. 423) 

 Roots of Marattiaceae, '98 (Fig. 391) 

 Ruffordia, 169 



Saccoloma, 268, 274; polycyclic axial system 

 of, 270 (Fig. 538) 

 S. e/egans, stock of, 270 (Fig. 538) 

 Sagawptcris, 191 



Sa'hni, Clepsydroideae,25; Dineuroideae, 27 

 Saprophytic gametophyte, 75 

 Scales, broad, of Cyatheaceae, 307; broad, 

 oi Eu-Gleichenia, 195 ; oi Gl.Jiabellata, 

 216 (Fig. 495); chaffy, 295; of Cya- 

 theaceae, 296; of Marattiaceae, 97; of 

 Mokria, 163; on prothallus, 303; on 

 prothallus of Ahophila, 303 

 Sctptn'ditan, 93 



Schizaea, 153, 175; antheridia of, 171 (Fig. 

 457); archegonia of, 171 (Fig. 457); 

 compare with Pilularia americana, 185; 

 comparison of, 174; comparison with 

 Mm-silea, 191; fertile leaves of, 154 

 ^ (Fig. 437); sporangia of, 163 

 6". dithotoma, stelar construction of, 159 



(Fig. 444) 

 5. digitata, pinna of, 165 (Fig. 449) 

 S. petiniila, sporangia of, 167 (Fig. 451) 

 S. pusilla, prothallus of, 171 (Fig. 457) 

 S. rupfsiris, origin of the sporangia of, 

 164 (Fig. 448) ; young fertile leaves of, 



190 (Fig. 471); young leaves of, 164 

 (Fig. 448), 189 (Fig. 470) 

 Schizaeaceae, 7, 8; anatomy of, 157; com- 

 parison of, 172; dermal'appendages of, 

 163; distribution of, 330; habit of, 153 

 sqg. (ch. xxn); indusia of, 173; leaves 

 of, 153; "monangial sorus" of, 233; 

 sporangia of, 157 (Fig. 441), 167 (Fig. 

 451); spore-output of, 170; spore-pro- 

 ducing members of, 163; undivided 

 leaf-trace of, 160; venation of, 160 ; 

 young sporangium of, 170 (Fig. 455) 

 Scolecopteris, 114 (Fig. 406) 

 S. e/ega/is, 100 (Fig. 393) 

 Secondary wood of Zygopterids, 25 

 Section of stem of Angiopteris evecta, 102 

 (Fig. 397); of stem of Psaronius, 106 

 (Fig. 400); of stem of Todea Fraseri, 

 134 (Fig. 425) 

 Segmentation at the margin of leaves, 238 



(Fig. 508); of young sporangium. 308 

 Sefifie;ibcrgia, 114 (Fig. 406), 153; spor- 

 angium of, 168 (Fig. 452) 

 Senfteiibetgia elegans, 7 

 Sedation, phyletic, 8 

 Seward, Hooker Lecture by, 327 

 Sex-organs of Hymcnophyllum dilatatiiiii, 

 247 (Fig. 519) ; o{ Marattia Doiiglasii, 

 119 (Fig. 411); of Ophioglossum pe7j- 

 diditm, 1 19 (Fig. 411); of Trichonianes 

 pyxidiferiim, 247 (Fig. 518) 

 Sexual organs, 4 ; of Heh)iiiithostachys zey- 



lanica, 77 (Fig. 378) 

 Sheathing stipule, 67 

 Shoot, simple, 2 ; of Ophioglossum viili^atitm 



48 (Fig. 341) 

 Simphces, 233, 325 ; general review of, 228 



sgq. (ch. xxvi) 

 "Siphonostele, amphiphloic," 137 

 Solenostele of Anemio7-?iiiza, 172 ; of Dip- 

 tens, 315; of Loxsoma Cunniito-hami, 

 254 (Fig. 522) 

 Solenostehc rhizome of Cibotitun Barometz, 

 264 (Fig. 531); structure of Gleichenia 

 pectinata, 199 (Fig. 481) 

 Solenostely oi Glcichetiia pectinata, 199, 215 

 Soral construction of Gleichenia /inearis, 

 199; G. pecfinaia, 199; estimates of 

 Hymenophyllaceae, 244 ; position, con- 

 stant feature of, 310 

 Sori of Cyathea siniiata, 300 (Fig. 557); of 

 Cyatheaceae, 299; (intra-marginal) of 

 Dennstaedtiinae, 273 (Fig. 541); of 

 Dicksoniaceae, 264 (Fig. 530) ; of Dip- 

 iQvida.ce?ie,^i6;o{Gieic'heniadichotoma, 

 206 (Fig. 489), 207 (Fig. 490) ; of G. 

 flabellata, 196 (Fig. 476), 207 (Fig. 490); 

 of Gleicheniaceae, 196; of Hymenophyl- 

 laceae, 240; of Marattiaceae, 109 (Fig. 

 402); of Marattiaceous fossils, 113; of 

 Metaxya, 290 

 Sorus, comparison of, 3 ; individuality of, 3 ; 



