INDEX 



355 



Parthenogenetic embryo oiMarsilia Drinii- 



7nondii, 325 (Fig. 303) 

 Pellaea^ root of, 175 



P. rotuiidijolia^ vascular system of, 148 



(Fig. 139) . . „ , , 



Peltate hairs, 239 ;, mdusmm, 238 ; scales of 



Polypodiuni incanujii, 200 (Fig. 188) 

 Perennation in Anograinme chaerophylla^ 



276 

 Perennials, 2)1) 

 Perforation, 149, ,169 

 Pericycle, 5 "^ 



Perispore, 259, 261 (Fig. 257) 

 Petiole, base of, of Gleichenia dicarpa, 170 



(Fig. 164); of Davallia spdimcae, 166 



(Fig. 159); of Saccoloma elegans^ 169 



(Fig. 162) 

 Petioles, meristeles in, 171 (Fig. 165); 



sections of, 168 (Fig. 161); transverse 



sections of, 189 (Fig. 181) 

 Phlebodiiiin aureiim, 42 (Fig. 48); scales of, 



202 (Fig. 190); sporangium of, 245 



(Fig. 240) 

 Phloem, 5 ; internal, 145 

 Phloeoterma, 138 

 Phyletic classification, 53 ; drift, 270 ; slide, 



221, 222 

 Phyllopodium, 82, 160, 165, lyj 

 Phyllorhize, 315 

 Pihilaria, 48 



P. americana^ sporangium of, 256 (Fig. 



253) 

 P.globulifera, 78 (Fig. 72) 

 Pinna, fertile, of Diptet'is Lobbiana, 227 



(Fig. 222) ; of Alsophila blechnoides, 



227 (Fig. 223) 

 Pinna-supply, extra-marginal type of, in 



Dryopteris vivipara, 172 (Fig. 168); 



marginal type of, in Pteris umbrosa^ 



172 (Fig. 167) 

 Pinna-trace, 160, 172; extra-marginal, 173; 



m Lophosoria, 174 (Fig. 170); marginal, 



173 

 Pinnule, fertile, of Klukta extlis, 252 (Fig. 



248); of Hypolepis repens^ 221 (Fig. 



216) 

 Pinnules, apices of, of Osmtmda regalis^ 



var. cristata, 333 (Fig. 307) 

 Pith, 124; extrastelar, 188; intrastelar, 127, 



188; mixed, 126, 184; mixed, o{ Meta- 



clepsydropsis duplex, 127; mixed, of 



Osmiotda regalis, 127 (Fig. 120) 

 Plagiogyria, 150; pneumatophores of, 204 



(Fig. 194) 

 P.pycnophylla,rh\zomQ?,oi, 148 (Fig. 138) 

 Plant-body, constitution of, 60 

 Plasmodium, 259 

 Platycerium, sporangium of, 254 (Fig. 251); 



three-rowed segmentation of, 247 

 P. angolense, sporophyll of, 233 (F'ig. 231) 

 Platyzoma, 131 ; spores of, 265 (Fig. 258); 



stele of small plant of, 132 (Fig. 125) 



Pneumathode-areas, i6g 



Pneumathodes, 169; lenticel-like, of Al- 



sopliila crhtita, 203 

 Pneumatophores, 203 ; of Plagiogyria, 204 



(Fig. 194) 

 Polarity of embryo, 300, 313 ; of spindle, 313 

 Pole, basal, abortion of, 346 

 Polybotrya, sori of, 234 (Fig. 234) 

 Polycyclic axial system of Saccoloma ele- 



gans, 153 (Fig. 146) 

 Polycycly,' 151, 155 

 Polyphylesis, 343 

 Polypodiaceae, 54; types of indusium in, 



236 (Fig. 236) 

 Polypodium bifrons, 44 (Fig. 51) 



P. incainiin, peltate scales of, 200 (Fig. 



188) 

 P. lingua, stellate hairs of, 200 (Fig. 188) 

 P. vtdgare, 33 (Fig. 39) ; archegonia of, 



18 (Fig. 21); conical stem of, 179 (Fig. 



171) ; dorsiventral rhizome of, 67 (Fig. 



57 bis) ; spores of, 260 (Fig. 256) ; water- 

 glands of, 205 (Fig. 196) 

 Polystichinn angularc, var. piilcherrinium, 



321 (Fig. 296 cont^ 

 Primary increase, 178 

 Primitive Fern-sporophyte, 2)1)1 ! Ophio- 



glossaceae, mycorhizicprothalli of, 295; 



spindle, 313, 344 ; type of fern-leaf, 337 ; 



vascular construction, 338 

 Primordial organs, relations of, 314 

 Principal walls, 107, 112 

 Principle of similar structures, 177, 191 

 Procambial destination, 144, 145 

 Progressive simplification of structure, 1 17 

 Propagation, vegetative, 10 

 Protections, indusial. 62 

 Prothalli, hairs on, 277 (Fig. 268); my- 



corhizic, of primitive Ophioglossaceae, 



295 ; of HelmintJwstacJiys zeylanica, 



283 (Fig. 274) ; of Pteris longifolia, 



276 (Fig. 267) ; of Scolopendriiim, 284 



(Fig. 275) 

 Prothalloid cylindrical process of Nephro- 



dium dilatatuvi, bearing archegonia, 



323 (Fig. 299) 

 Prothallus, i, 14, 16 (Fig. 19); cordate type 



of, 273 (Fig. 265); filamentous type of, 



278, 280 (Fig. 270); form and physiology 



of, 62; of Schizaea pusilla, 279 (Fig. 



269) ; of Trichonia7ies alatuni, 281 (Fig. 



271); saprophytic, of Hehiiinthostachys, 



283 

 Protocorm, 341 

 Protostele, 121, 181 ; of Cheiroplemia, 122 



(Fig. 115); of rhizome of Gleichenia 

 Jlabellata, 141 (Fig. 131); primitive 



vascular construction, 338; upgrade 



development from, 133; varying form 



of, 183 

 Protoxylem, 6 

 Protoxylem-groups, 164 



