o8 



I XD E X. 



Phyllopodium, 214 note. 

 Phyllosiphon Arisari, 28. 

 Physalis Alkekenghi, growth, 



451. 

 Physarum album, 14. (Fig. 



8.) 

 Physcia, 125; soredia, 124; 



zoospores, 124. 

 Physcia parietina, Figs. 85, 



84. 

 Physcomitrium, protonema, 



163. 

 Physma, 125. 



Physma chaiaganiim, Fig. 84. 

 Physma compactum, apo- 



thecia, 122. 

 Phytelephas,endosperm, 395, 



429 ; seed, 430. 

 Phytolacca dioica, stem, 466, 



467. 

 Phytolaccaceae, 468. (Fig. 



400.) 

 Phytocrene, stem, 466. 

 Phytophthora, 92, 96, 99. 

 Phvtophthora intestans, 94. 



(Fig. 56.) 

 Phytophthora omnivora, 96 ; 



sexual process and germi- 

 nation, 99. 

 Picea, classification, 339; 



cone, 328. 

 Picea excelsa, archegonium, 



333- 



Picea vulgaris, embryo, 337. 

 (Fig. 260.) 



Pileus, 131,1 32, 135. 



Pilobolus, 91. 



Pilularia, archegonium, 232 ; 

 leaves, 235, 236; macro- 

 spores, 232; microspores, 

 230 ; prothallium, 232 ; 

 sporocarps, 240 ; stem, 

 236. 



Piluiaria americana, 240. 



Pilularia globulifera, 240,242, 

 243. (Figs. 191, 195, 197, 

 198, 199.) 



Pilularia minuta, 240. 



Pinus, 339 ; bilateral deve- 

 lopment, 321 note; cone, 

 328, 339; female flowers, 

 326 ; floral axis, 323 ; leaf, 

 345 ; male flowers, 325 ; 

 phyllotaxis, 322 ; pollen- 

 sacs, 325; pollination, 325; 

 seed, 331, 



Pinus picea. Fig. 250. 



Pinus pinaster, archegonia, 

 333, 334. (Fig. 266.) 



Pinus pumilio, cone, 328. 

 (Fig. 260.) 



Pinus strobus, archegonia, 

 334; embryo, 337, note 2; 

 fertilisation, 335. 



Pinus sylvestris, branching, 

 320, 321 ; fertilisation, 

 325 ; flowers, 322. (Figs. 

 264, 265.) 



Piperaceae, cauline bundles, 

 303 ; floral diagram, 459 ; 

 floral envelope, 3 49; flower, 

 349; ovary, 376; ovule, 

 377, 382. 385; perisperm, 

 394; seed, 446; stem, 465, 

 466. 



Pipereae, 468. 



Piperineae, 468. 



Piptocephalideae, 91. 



Piptocephalis, 91; stilogoni- 

 dia, 10. (Figs. I, 55.) 



Pistia, endosperm, 441 ; sus- 

 pensor, 400. 



Pistilla, 145 note. 



Pisum, fruit, 428. 



Pitchers, 453. 



Pith, 462. 



Pittosporeae, 470. 



Placenta, 305, 370. 



Plagiochasma, branching, 

 162 ; sexual organs, 160. 



Planogametes, 5, 7. 



Plantagineae, 471. (Fig. 388.) 



Plantago, endosperm, 461 ; 

 fruit, 429; inflorescence, 

 411 ; protogyny, 405. 



Plantago arenaria, seeds,4 3o. 



Plantago Cynops, seeds, 430. 



Plantago Psyllium,seeds,43o. 



Plasmodia, 15. 



Plasmodiophora Brassicae, 

 14. 



Plasmodium, formation, 15, 

 16. 



Platanaceae, 468. 



Platanus, floral diagram, 459; 

 intrapetiolar buds, 451. 



Platyceriuni, branching of 

 leaves, 213. 



Platycerium alcicorne, apical 

 cell, 210; leaf-forms, 209. 



Pleospora, perithecia, 108. 



Pleospura herbarum, apo- 

 gamy, 102. 



Plerome, 302, 397. 



Pleurocarpous Mosses, 174. 



Pleurocladia, 65. 



Pleurococcus, 35, 41 ; in re- 

 lation to Lichens, 120, 125. 



Plocamium, 75. (Fig. 48,) 



Plumbagineae, 471 ; con- 

 ducting tissue, 390 ; fu- 

 nicle, 381 ; seed, 445. 



Podocarpeae, 339 ; leaves, 

 322 ; pollination, 325. 



Podocarpus, 339 ; aril, 330, 

 338; floral axis, 331; fruit, 

 339; ovule, 331; pollen- 

 grain, 325. 



Podocarpus chilina, 330. 



Podocarpus chinensis, 330. 



Podocarpus dacryoides, 330. 



Podocarpus macrophylla. 

 Fig. 256. 



Podophyllum, floral formula, 

 459 ; stem, 465. 



Podosphaera, 84, loi ; fruc- 

 tification, 8, 100, loi, 104, 

 105. (Figs. 6, 63.) 



Podosphaera Castagnei, Fig. 

 65. 



Podosphaera pinnosa. Fig. 

 65. 



Podostemaceae, 472 ; ab- 

 normal development, 461. 



Pogonatum, antheridia, 174. 



Polanisia graveolens, Fig. 

 346. 



Polar nucleus, 387. 



Polemoniaceae, 47 t. 



Pollen-grains, 300, 304, 363; 

 sculpturing, 365 note ; ho- 

 mologies, 365 note. 



Pollen-sacs, 301, 304. 



Pollinia, 369. 



Pollinodium (Ascomycetes), 



lOI. 



Polybotria, 227. 



Polycarpellary, 372 note. 



Polycarpic perennial plants, 

 403. 



Polycarpicae, 468 ; floral 

 formula, 458. 



Polycarpous flower, 372. 



Polychidium, 124. 



Polygala grandiflora, flower, 

 Fig. 353- 



Polygalaceae, 469. 



Polygonaceae, 468; nucellus, 

 305 ; ovule, 305, 377, 382 ; 

 seed, 445 ; sporogenous 

 tissue, 388 ; variation in 

 synergidae, 389. 



Polygonatum multiflorum, 

 Fig. 357. 



Polygonum amphibium, 



growth, 451. 



Polygonum divaricatum, nu- 

 cellus, 386. (Fig. 319.) 



Polygonum Fagopyrum,Figs. 

 315, 3^5- 



Polygonum multiflorum, la- 

 teral shoots, 433. (Fig. 

 357.) 



Polyhedra in Hydrodictyon, 

 40. 



Poly ides rotundus, 80. 



Polymerous (ovary), 372 and 

 note, and 374. 



Polypetalous, 352. 



Polyphagus Euglenae, zygo- 

 spore, 85. 



Polypodiaceac, 194, 197, 198. 



