?02 



INDEX 



of, 8 1, 82 (Fig. 336), 87 ; Prantl's group- 

 ing of, 84; stelar structure of, 81 ; vari- 

 able spore-counts of, 84 

 Pellaea atropurpiu-ca, solenosteles of, 81 

 P. connectejts, an intermediate type, 84 

 P.falcata, solenosteles of, 81 

 P. inti-amargittalis, fiange of, 193 ; indu- 

 sioid margin of, 83 (Fig. 638) ; young 

 sorus of, 83 (Fig. 638) 

 P. rotundifolia^ vascular system of, 83 

 (Fig. 637) 

 Peranona, 99, 119, 124, 277; anatomy of, 



108 (Fig. 652) ; habit of, 107 ; lateral 

 pouches of, 150; leaf and sorus of, 106 

 (Fig. 650) ; prothallus of, 1 1 1 ; sorus of, 



109 (Fig. 653) ; sporangia of, 1 1 1 ; 

 young sori of, no (Fig. 654) 



Perispore, inconstant, in Blechnoids and 

 Onocleoids, 166; occurrence of, 126; 

 of Shield Fern, 125 



Petiolar meristele of Diellia falcafa, 27 (Fig. 

 596) 



Petiole of Cheiropleuria, 204 (Fig. 714) ; of 

 Matteuccia stricthiopteris, 1 60 ( F ig. 68 5 ) 



Phanei-ophlebia^ i yj 



Phegopteris^ 277, 278 



Phlebodium, 232 



Phyletic, classification, 3, 39; drift, 286; 

 grouping of Aspidieae, 137 ; grouping of 

 Blechnoid Ferns, 198 ; groupingofOno- 

 cleeae, 162; grouping, summary of, 268 ; 

 margin of sporophyll in Blechnuvi^ 165; 

 scheme, 2; slide, 193, 288, 289; slide 

 in B/ec/imuii, 173; slide of sorus in 

 Pteroids, 54 



Phyllitis^ 138, 151, 186, 191, 197, 199; indu- 

 sium of, 196; relation to Asplenitmt, 

 197 ; sori of, 189 

 P. Durvillei, 191 

 P. /icinionitis, 189 

 P. {Schaffne7'id) nig7'ipes^ 190; habit of, 



191 (Fig. 708) 

 P. Scolopendrium, 138 (Fig. 669), 188, 

 279; sori of, 186 (Fig. 706), 196 



Pimpinelloid form of leaf of Stejtochlaena 

 sorbifolia^ 175 



Pinna oi Blechnum Fraseri, 180 (Fig. 701); 

 of ^. spicant^ 180 (Fig. 701) : oiBf'aitiea 

 znsigms, 181 (Fig. 702) ; oi Diellia fal- 

 cata, 28 (Fig. 597) ; oi Lindsay a lancea, 

 32 (Figs. 601, 602); oi Lomaria, 167; 

 oi Lonchitis aurita^ 48 (Fig. 612); of 

 Metaxya rostrata^ 233 (Fig. 734) ; of 

 Saffordia induta, 86 (Fig. 640); of 

 Woodwardia radicajts, 181 (Fig. 702) 



Pinnae oi Blechnum {Salpichlaend) volubile^ 

 172; oi Eu-Blechnuni, 171 



Pinnule of Cysiopieris fragilis, 251 (Fig. 

 747) ; of Dennstaedtia dissecta^ 8 (Fig. 

 584) ; of Hypolepis repens, 9 (Fig. 586) 



Plagiogyria, 72, 7 2., 81, 92, 160, 281 



Platycefiit/n, 232,280; Dipteroid character 

 of, 208 (Fig. 709) ; foliage leaves of, 208 ; 

 habit of, 207; nest-leaf of, 208; stellate 

 hairs of, 21 1 ; vascular system of, 208 ; 

 venatio aiiaxeii^ 210 

 P. aethiopicuni, 209 ; diplodesmic state 

 of, 210 (Fig. 719); sporangium of, 212 

 (Fig. 721) 

 P. alcicorne, 209 ; rhizome of, 209 (Fig. 



718) 

 P. angolense, sori of, 205 (Fig. 715) 

 P. Veitchii, juvenile leaf of, 202 (Fig. 711) 

 P. willinkii^ diplodesmic systems of, 211 

 (Fig. 720) 

 Platyzoma, 275 

 Plecosonis, 131, 137 

 Pleopellis, 222, 224, 232 ; soral details of, 



225 (Fig. 732) 

 Pleiirogramme^ 239 



Pleiirosoriis,<^2, 138, 151, 278; abortive in- 

 dusium of, 147 

 P. Pozoi, 148 (Fig. 677) 

 Point, critical, 290 



Polybotrya, 121, 131, 134, 137,277,278; sori 

 of, 134 (Fig. 666) 

 P. cervina^ 133 

 P. osmuiidacea^ 133 

 Polycycly of Pteris, 52 ; oi P. podophylla, 



53 

 Polyphyletic progression, 293 

 Polypodium^ 3, 12, 121, 129, 130, 200, 249, 

 274, 277, 281, 283, 288 

 P. obliquatian, 254, 255 (Fig. 750) 

 P. {P/ilebodiuni) mireuin, young sorus of, 



227 (Fig. 733) 

 P. {Phlebodiuni) decuinaftitm, 224 

 Polystichu?)i, 121, 137, 277; indusium of, 

 114; indusium superum of, 127; orbi- 

 cular indusium of, 128 

 P. aculeatum^ 121 

 P. anomalum, 259 

 P. lonc/iiiis, 121 

 Prantl, "Lonchitidinae" of, 41 

 Prickly Shield Fern, 121 

 Primitive Filicales, 2 

 Primitive Gynmogrammoid Ferns, 65, 93 ; 



comparison of, 72 

 Progress, convergent, 283 

 Progression, Class, 2S6 ; polyphyletic, 293 

 Progressive drift, 284 ; reductions, 284 

 Proportion of surface to bulk, 289 

 Prosaptia, 15, 17, 255, 282 ; habit and char- 

 acters of, 255 ; history of, 254 

 P. alata, 16 (Fig. 588) 

 P. Reineckii, 16 (Fig. 588) 

 Protective scales, 12 



Prothalli oi Adiantnm, 80, 96; oi A. cune- 

 atum^ 80 (Fig. 635) ; of Anemia^ collen- 

 chymatousthickeningof, 80 ; oiA.Phyl- 

 litidis, 80 (Fig. 635); of Cheilanthes, 

 90 ; of Cystopieris, 252 ; oi Hecistopteris 



