INDEX 



303 



puviila, 245 (Fig. 745) ; of Pemnema 

 in; of Vittaria liiieata, 245 (Fig. 745); 

 of Woodsia, 100 

 P7-oto)na?-at/ia, 142 



Protostele oi Cheiropleitria, 203 (Fig. 712) 

 Psilophy tales, 267, 269 r tt 1 



Pterideae, 14, 40; of Diels, 63 ; of Hooker, 



63 

 Pterideae-Cheilanthinae, 6, 81 

 Pterideae-Pteridinae, 41, 63; grouping of, 



60 

 Pteridella, 82 

 Pteridinae, 40 

 i"/^;-/V////w, 41, 6r, 274, 288 ; a synthetic type, 



45 



P. nquilinion, coenosorus of, 43 (Fig- 608) ; 

 development of coenosorus of, 44 (Fig. 

 609); vascular commissure of, 44 (Fig. 

 609) ; vascular system of, 42 (Fig. 607) ; 

 young plant of, 42 (Fig. 606) 



P. aqnilimim \'ar. caudatum, 44; sorus 

 of, 45 (Fig. 610) ; sporangia of, 45 (Fig- 

 610) 

 P/mj, 12,61,289 ; accessory vascular strands 

 of, 52; definition of genus, 51; poly- 

 cycly of, 52 ; scales of, 52 ; sorus of, 54 ; 

 superficial origin of sorus of, 55 ; super- 

 ficial origin of sporangia in, 56 ; vascu- 

 lar structure of, 52 



P. Kunsea?ui, vascular system of, 53 (Fig. 



617) 

 P. {Litobrochid) fodophylla, mixed sorus 

 of, 57; widened receptacle of, 57 (Fig. 

 620) 

 P. podophy/Ia, polycycly of, 53; vascular 



system of, 53 (Fig. 618) 

 P. scrrnlata, young sori of, 55 (Fig. 619) 

 Pteroid derivatives, 56 



Pteroid Ferns, 14, 40 sqq. (ch. XXXVlll), 

 274; grouping of, 60; reticulate vena- 

 tion of, 56 ; transitional, 56 

 Pteroids, 2 ; phyletic slide of sorus in, 54 

 Pterozomuvi^ 75, 97 



Receptacle, marginal position of, 36; widen- 

 ed, oiPteris{Litobrochia)podophylla, 57 

 (Fig. 620) 



Reductions, progressive, 284 



Regeneration, 292 



Rhipidopteris, 149, 278 



Rhizome of Cheiropleiiria, 203 (Fig. 713); 

 of C. bicuspis, 201 (Fig. 709); oi Ltiid- 

 saya, 31 (Fig. 600 bis); oi Odontosoria, 

 31 (Fig. 600 fe); oi Platy cerium aid- 

 come, 209 (Fig. 718) 



Saccoloma, 5 (Fig. 581), 15 



Sadleria, 1 94, 198 ■ . \ 



5. Cyatheoides, coenosori of, 172 (Fig. 694) 

 Saffbrdia, 85, 97, 98, 282 



S. induta, basal pinna of, 86 (Fig. 640) 



Sage/iia, 128 



SalpicJilaena, 163 



Salviiiia, 260, 282 



Salviniaceae, probably gradate Marguiales, 



262 

 Scales, chaffy, 275 ; dermal, ai Davalha, 17; 

 of C/iristflpteris, 218; oi Neocheiropteris, 

 220 (Fig. 728); of Pieris, 52; protec- 

 tive, 12 

 Schizaea, 272 

 Schizaeaceae, 272 ; comparison with Notho- 



laena, 94 

 Scolopendriiim, 138, 149, 186, 191 

 5. Krebsii Kunze, 185 

 6". Kienzii, 188 

 Segregation, Mendelian, 286 

 Selaginclla laevigata, vascular system of, 54 

 Selection, Natural, 286 

 Sequence, unbroken, 285 

 Series, Marginal, 278; Superficial, 278 

 Sexual organs of Woodsia, 100 

 Shield Fern, gametophyte of, 126; indu- 

 sium of, 124; perispore of, 125; re- 

 ceptacle of, 123 

 Simplices, 272 

 Size, a limiting factor, 289 ; in relation to 



vascular complexity, 53, 54 

 Size-factor, incidence of, 31 

 Slide, phyletic, 288, 289 

 Solenosteles of Histiopteris incisa, 48, 49 

 (Fig. 613) ; oiPellaea atropurptirea, 81 ; 

 oiP.falcata, 81 

 Somatic cells, 292 



Soral area of Acrostichitni pracstantissi- 

 miim, 58 (Fig. 622); area oi Elapho- 

 o^lossum latifoliitm, 238 (Fig. 739) ; cha- 

 racter, changes of, 1 1 ; condition of 

 Hypoderris, 104; details of Anetiiim 

 citrifoliiim, 244 (Fig. 744) ; details of 

 Pleopeltis, 225 (Fig. 732); hnkage of 

 Lomaria, 192; morphology oi Asple- 

 iiiitni, 141; origin of Histiopteris in- 

 cisa, 50 (Fig. 615) ; region of Christop- 

 teris tricuspis, 216 (Fig. 724); surface 

 of Elaplwglossum, 235 ; variations of 

 Blechnimipit7ictulatu7n Sw. var. Krebsii 

 Kunze, 186 (Fig. 706) 

 Sori, lateral fusion of marginal, 22 ; linkage 

 of, 24; linkage to form coenosori in 

 Davaliioids, 36 ; of Aerophones stipel- 

 latiis, 131 (Fig. 662); of Acrosiichum 

 praestantissimum, 58 (Fig. 621); of 

 Adiantwn, 78; oi Antrophyum semi- 

 costatwn, 242 (Fig. 742); of Asple- 

 niiim, 138 (Fig. 669); oi Athyrium, 

 144; of ^. decurtatiim, 145 (Fig. 674); 

 oi Azolla filicidoides, 261 (Fig. 754); 

 of Cainptosorus rhizophyllus, 190 (Fig. 

 707); of Ceratopteris, 71 ; of Cheiro- 

 pleuria, 205 (Fig. 7i5)-. oi Cystopterts 

 fragilis, 250; of Davallioid Ferns, 36; 



