724 



INDEX 



Ophioglossitm, external characters, 431 ; 

 spore-producing members, 447 ; spore- 

 mother-cells, 451 (Figs. 250, 251); ana- 

 tomy, 458 (Figs. 256, 258, 259); embryo, 

 466 (Fig. 260); prothallus, 464; trotalo- 

 phoroides, 431 ; opacum, 431 ; vitlgatiim, 

 431 (Fig. 235); Bergiannm, 433; bulbo- 

 smn, 433 ; nndicaulc, 433 ; litsitanicuni, 

 423 ; pendulum, 435 ; pa'/natitiii, 435 

 (Figs. 238, 239): simplex, 441; intir- 

 iiicdiiini, 441 ; reticiilatiini, 439, 448 (Fig. 

 246); 451 (Fig. 250). 



Orientation of embryo variable, 666. 



Origin of members as new structures, 659 ; 

 objections answered, 680. 



Osmitnda, 530 (fig. 293) ; sporangia of, 

 532, 535 (Figs. 296 bis, 296) ; anatomy 

 of. 536 (Figs. 298, 299) ; embryology of, 

 540 : reduced leaves of, 239 ; regalis and 

 javanicn, 169 (Fig. 90). 



Osmundaceae, external characters, 530 (Fig. 

 293) ; spore-producing members, 533 ; 

 anatomy, 536 ; embryology, 540 ; phyletic 

 position of, 654 (Fig. 354). 



Osmundites, 539. 



Overtopping, 135, 136. 



Pachytheea, 228. 



Palaeophytology, evidence of, 227 ; its 

 limitations, 229. 



Palaeopteris hibcrnica, 582. 



'Palaeostachya, 150 (Fig. 81) ; rerct, 375 

 (Fig. 203) ; morphology of cone, 384 

 footnote. 



Parts, independent origin of, 183. 



Pecopteris, 528; (Dicksonites} Phtcken, //, 

 528; dentata, 519 (Fig. 287); unit*, 520. 



Pellia, 266 (Fig. 128). 



I'criblem, 178. 



Periodic reduction, 84. 



/' nmospora, 68. 



Phasntm, 282 (Fig, 139). 



Phragmidium, 69. 



Phyllanthus, 126. 



Phylloglossum, 297 (Figs. 145, 146); spor- 

 angium of, 315; embryology of, 352, 355 

 (Fig. 189); detached leaf-traces, 199; 

 protocorm of, 225. 



1'hylluids (Lignier), 131). 



Phyllopodium , 629. 



Phyllosiphonic structure, 139, 198; state, 

 may be derived from cladosiphnnic, 487-8; 

 .secondary, 648. 



Phyllothefa, 150, 167, 372 (Fig. 197), 384. 

 Phylogeny of Filicales, 652. 

 Physcomitrella patens, 36 (Fig. 20). 

 Physcomitriiim, 280 (Fig. 137). 

 Physiological experiment, 6; a check on 



phyletic speculation, 236. 

 Phytonic theory, anatomical aspect of, 188; 



of Delpino, 135. 



Picea excelsa, ovule of, 41 (Fig. 27). 

 Pilnlaria, 551. 



Pinakodendron imtsivum, 304. 

 Pinitx Laricio, germination of pollen, 42 



(Fig. 28). 

 Platvt'eriinn, 631. 

 Platyzoma, 553. 

 Plerome, 178. 

 Pleuromoia, 22O (Fig. 114), 302 (Fig. 151); 



strobilus of, 304 (Fig. 154). 

 Podostemaceae, symmetry of, 201. 

 Polarity, 203 ; of embryo variable, 666 ; 



inversion of, 675. 

 Pollen-mother-cells, 49 (Fig. 32). 

 Polygonum, ovary of, 44 (Fig. 30). 

 Polyphyletic development, n. 

 Polypodium, 628 ; phyletic position of, 656 



(Fig. 354) ; piindatnin, 616 ; I'nlgare, 23, 



28, 214 (Figs. 7, 12, 110); symmetry of 



seedling, 214 (Fig. no). 

 Polysiphonia, 67, 81. 

 Polysporangiate state, 1 1 3. 

 Polystelic type, 189. 

 Polysticlnim an^iilare, v. pulchcrrimum ; 



apospory in, 55 (Fig. 37). 

 Polytrichaceae, stem-structure, 195-6. 

 Polytrickutn, 281. 

 Porella, 265 (Fig. 126). 

 Precocity of cotyledon, 670, 671 : of root, 



672. ' 



Primitive shoot, 716. 

 Progressive metamorphosis of Goethe, 157, 



251- 



Prohepatic type of Lignier, 137, 216. 



Prothalli of I.ycopodiitm, 340 ; saprophytic, 

 342 ; subterranean, 343. 



1'roihallus of Fern, 25. 



Protocalamariaceae, 373. 



1'rotncorm, 181, 223, 253, 672; in Phanero- 

 gams, 224; of Lycopods, 351. 



Protostelic state in primitive Ferns, 647. 



Protoxylem, peripheral in Lycopodium, 328; 

 central in Selaginella, 332. 



Psaronitix, 507, 526, 528. 

 373, 424. 





