502 



INDEX. 



Niphobolus chinensis, apical cell of, 



248. 

 Niphobolus lingua, apical cell of, 239. 

 Niphobolus rupestris, apical cell of, 



239, 248. 

 Nothochlseua, abortive prothallia of, 



197. 

 Nucleus in Abietinese, 400 ; in Juni- 



perus, 400 ; in Pinus, 400 ; in 



Taxus, 400 ; in Thuja, 400. 



Ophioglosseae, 307. 



Ophioglossum, prothallium of, obser- 

 vations of Mettenius upon, 315. 



Ophioglossum pedunculosum, root-buds 

 of, 315. 



Ophioglossum vulgutum, development 

 of vegetative organs of, 312. 



Orthotrichum, calyptra of, 159. 



Orthotrichum affine, development of 

 vegetative organs of, 139. 



Ovules of Coniferse, 400. 



Papillae, marginal, of leaves of Selagi- 

 nella, 380. 



Paraphyses of mosses, 153. 



Pellia epiphylla, 21. 



Perianth, of Alicularia scalaris, 69 ; 

 of Calypogeia Trichomanes, 70 ; of 

 Frullania dilatata, 69 ; of Junger- 

 mannise, 87 ; of Jungermannia bicus- 

 pidata and /. dlvaricata, 69 ; of 

 leafy Jungermannia?, 68 ; repre- 

 sented in Pellia epiphylla by the 

 pouch-shaped covering of the arche- 

 gouium, 33 ; of Radula complanata, 

 68 



Phascum, antheridia of, 152 ; arche- 

 gonia of, 149 ; calyptra of, 159 ; 

 development of fruit of, 156, 157, 

 158, 160 ; development of leaves of, 

 142 ; spore-mother-cells of, 160 ; 

 terminal bud of, 129. 



Phascum bryoides, development of 

 fruit of, 160. 



Phascum citspidatum,, spore-mother- 

 cells of, 160 ; spores of, 164, amoe- 

 boid movements of primordial utricle 

 in, 163. 



Phascum serratum, pro-embryo of, 172. 



Pliyllotaxis in Sphagnum, 136. 



Pilularia, development of fruit of, 318. 



Pineau, on the development of the 

 embryo in Conifer*, 407. 



Pinnse, of frond, formation of, in Pteris 

 aquilina, 209. 



Pinus, anther of, 401 ; Gottsche on 

 the seed and embryo of, 433. 



Pinus Abies, fecundation of, 418. 



Pinus balsamea, nucleus of, 400. 



Pinus Canadensis, fecundation of, 418. 



Pinus Larix, fecundation of, 419. 



Pinus Strobus, nucleus of, 400. 



Pinus syloestris, fecundation of, 417 ; 

 nucleus of, 400. 



Pith of Equisetum, 274. 



Plagiochila asplenioides, cell-multipli- 

 cation in apex of stem of, 442. 



Platycerium alcicorne, germination of, 

 182 ; vegetation of, 251. 



Pocket, of leaves of mosses, 143. 



Pollen, of Abietinese, development of, 

 405 ; Fritzsche's observations on, 

 405 ; of Coniferse, development of, 

 401, resemblance of vital pheno- 

 mena of, to those of the microspores 

 of Pilularia, &c, 438 ; of Cycadeae, 

 406 ; of Ephedra, Schacht on, 406 ; 

 development of, in Pinus syloestris, 

 P. maritima, P. balsamea and P. 

 Larix, 402 ; in Juniperus, Thuja 

 occidenlalis, Abies pectinala, and 

 Picea vulgaris, 405. 



Polleu-tubes of Couiferse, their entrance 

 into the endosperm, 415; develop- 

 ment of free spherical cells in the 

 ends of, 416 ; their penetration into 

 thecorpusculaprovedbyCorda, 432. 



Pollen-tubes in Taxus, Juniperus, 

 Pinus syloestris, P. Mughus, P. 

 Austriacus, and P. Strobus, 406. 



Poly-embryony of Coniferse, discovered 

 by Robert Brown, 432. 



Polypodiacese, prothallia, and anthe- 

 ridia of, 186. 



Polypodium aureum, apical-cell of, 

 239, 248. 



Polypodium cymalodes, apical-cell of, 

 239, 248. 



Polypodium Dryopleris, apical-cell of, 

 239 ; arrangement of fronds in, 249. 



Polypodium punctatum, apical-cell of, 

 248. 



Polypodium punctulatum, apical-cell of, 

 239. 



Polypodium vulgare, apical-cell of, 

 239, 218; arrangement of fronds 

 in, 249. 



Polytrichum, antheridia of, 152 ; 

 archegonia of, 149; development 

 of leaves of, 142 ; terminal bud of, 

 129. 



