INDEX. 



969 



Pollen-grains of Abietinege, ii. 721. 



oil on, ii, 101. 



sculpturing, ii. 100. 



specilic differences, ii. 490. 



viscin, ii. 101. 



Pollen-masses, concealment and withdrawal, 



ii. 252. 

 PoUen-niother-cells, ii, 96. 

 PoIlen-sac=microsporangiuiQ, ii. 478. 

 PoUen-sacs, dehiscence, ii. 91. 

 Pollen teti-ads and Bticky stigmas, ii. 283. 

 PoUen transference, explosive apparatus, ii. 

 266. 267. 



percussive apparatus, ii. 261. 



sprinkling apparatus, ii. 271, 273. 275. 



Pollen-tube, attraction by sugar-solutions, ii. 

 413. 



course, ii. 408. 



in Rock-rose, ii. 411. 



development of, ii. 106, 409. 



nuclei and fertilization, ii. 416. 



Pollination, adaptation to, i. 740 et seq, 



— after results, ii. 285. 



— agents in, ii. 129. 



— and fertilization, interval between, ii. 285. 



— and insects, ii. 95. 



— and withering of corolla, ii. 286. 



— by kangaroos, ii. 230. 



— conditions of successful, ii. 405. 



— of Vallisneria, ii. 132. 



— relation to fertilization, ii. 401. 

 PoUinia, nature of, ii. 97. 



— of Epipactis latifolia, ii. 255. 



— of Epipogiura aphyllum, ii. 226. 



— of Phalgenopsis Schilleriana, ii. 227. 

 Polyembryony, in Angiosperms, ii, 468. 

 Polygala araara, stamen, ii. 87. 

 Polygalacese, cleistogamy in, ii. 393. 



— staminal filament, ii. 88. 

 Polygonaceae, phyUocladous species, i. 334. 



— rolhng of leaf, i. 348. 

 Polygonatumverticillatum, mechanical tissue 



arrangement, i. 730. 

 Polygonum amphibium, leaf-rosette, i. 412. 

 protection of stomata from moisture, i. 



294. 

 Polygonum Bistorta, effect of mutilation, ii. 



517. 



geitonogamy, ii. 327. 



Polygonum bulbiferum, bulbils, ii. 454. 

 Polygonum Convolvulus, twining, i. 682, 685. 

 Polygonum Sieboldi, seed-dispersal, ii. 853. 

 Polygonum virginicum, seed-dispersal, ii. 841. 

 Polygoniun viviparum, dispersal of bulbils, 



ii. 454, 819. 



ice-melting, i. 500. 



rolling of leaf, i. 348. 



Polyhedra, of Hydrodictyon, ii. 641. 

 Polypetalge, floral characteristic, ii. 748. 



— of Bentham and Hooker, ii. 604. 

 Polyphagus Euglenaj, i. 169; ii. 668- 



life-history, i. 170; ii. 671. 



PolypodiacesB, description, ii. 706. 



— sporangium, ii. 705. 



Polypodium glaucophyllum, wax on fronds, 



i. 292. 

 Polypodium serpens, sporogenous frond, ii. 



11. 

 Polypodium vulgare, epiphytic, ii. 705. 

 Polyporeie, hymenium, ii. 688. 



— hyphis of, i. 165. 



Polyporus, destructive nature, ii. 688. 



— fossil remains, ii. 614. 

 Polyporus annosus, ii. 688. 

 Polyporus fomentarius, ii. 492, 688. 

 Polyporus igniarius, ii. 688. 

 Polyporus perennis, ii. 685. 



Polyporus sulfureus, behaviour of mycelium, 

 i. 167. 



cause of mouldering in wood, i. 263. 



Polysiphonia, lummosity, i. 388. 

 Polystigma rubrum, host, &c., ii. 678. 

 PolytrichaceKe, epiphragm, ii. 703. 



— teeth of peristome, ii. 703. 

 Polytrichum, apophysis, ii. 702. 



— folding of leaf, i. 346. 



— green absorptive cells, i. 85. 



Polytrichum, mechanism for water-absorp- 

 tion, i. 218. 



— phyllotaxis, i. 408. 



— spore-dispersal, ii. 814. 

 Polytrichum commune, leaf, sections, i. 



346. 



sporogonium, &c., ii. 15. 



Pomaceee, persistent receptacle, ii. 435. 

 Pondweeds. See Potamopeton. 

 Pontederia crassipes, floats, i. 638, 669. 

 Poplar, suitability as host for Mistletoe, i. 



209. 

 Poppy, in Egyptian tombs, i. 580. 



— metamorphoses of the leaves, i, 11, 

 Populus, dissemination, i. 614. 



— numerous hybrids, ii. 583. 



— pollination, ii. 133. 



— porogamic fertilization, ii. 413. 



— protection of pollen, ii. 119. 



— water-absorption, direct from atmosphere, 



i. 238. 

 Populus alba, age, i. 722. 

 deciduous protective woolly hairs, i. 



354. 



dimensions, i. 722. 



mycelial mantle of roots, i. 250. 



pistillate flowersandTaphrinaaurea, ii. 



524. 

 Populus nigra, adventitious buds, i. 766. 

 plants and animals which live upon, 



within, or in association with, i. 256. 

 Populus pyramidalis, venation, i. 631. 

 Populus tremula and nut-galls of Saperda 



populnea, ii. 543. 

 development of adventitious root-buds, 



ii. 26. 



elastic petioles, i. 428. 



leaf, absorption-cups in surface view 



and section, i. 233. 



hnear arrangement of offshoots, ii. 795. 



normal and sucker leaves, ii. 515. 



seed, ii. 423. 



two kinds of leaves, i. 238. 



variety in asexual shoots, ii. 471. 



Porlieria hygrometrica, leaf movements, i. 



339. 

 Porogamic fertilization, ii. 412. 

 Porous cells, of Leucobryum, Sphagnum 

 and Laslia gracilis, i. 219. 



— dehiscence of pollen-sacs, ii. 92. 



— envelope of Orchid aerial roots, exfolia- 



tion in soil, i. 223. 

 Porphyra, habit, i. 587. 

 Portulaca, pollen-grains, ii. 98. 



— propagation of hybrids, ii. 656. 

 Portulaca grandifl.ora, &c., opening and 



closing, ii. 212. 

 Portulaca oleracea, weather and autogamy, 



ii. 391. 

 Posidonia, pollen and pollination, ii. 104. 

 Posoqueria fragrans, flower and visitors, ii. 



225. 

 Potamogetacese, embryos, ii. 738. 



— habit and pollination, ii. 738. 

 Potamogeton, adaptation to environment, i. 



424. 



— dichogamy, ii. 135. 



— pollen dispersion, ii. 105. 



— pollination, ii. 133. 

 Potamogeton crispus, ii. 739. 



hibernating shoots, i. 551, 552. 



pollination, ii. 148. 



protogynous, ii. 311. 



Potamogeton fluitans, habit and habitat, ii. 

 502. 



length, i. 388. 



Potamogeton heterophyllUB, &c., heterophyl- 

 lous, i. 668. 



Potamogeton lucens, amoimt of lime forma- 

 tion, experimental determination, i. 261. 



Potamogeton natans, position of stomata on 

 leaves, i. 280. 



Potassium, in ash of plants, i. 66. 



— salts of, accumulation through plants, i. 



261. 

 Potato, sprouting, i. 494, 562. 



— starch, i. 459. 



Potato-disease, due to Phytophthora infes- 



tans, ii. 669. 

 "Potato-rain", cause of, i. 651. 



superstition concerning, ii. 810. 



Potentilla, hybrids, inexhaustible, ii. 585. 



— receptacles and carpels, ii. 76. 



— Marsh. See Comarum palustre. 



— nectary, ii. 174. 



Potentilla atrosanguinea, autogamy, ii. 381. 

 Potentilla cinerea, hairs, i, 322. 

 Potentilla Clusiana, procumbent, i. 662. 

 Potentilla micrantha, flower, ii. 174. 



nectary concealment, ii. 181. 



Potentilla nitida, procumbent, i. 662. 

 PotentUla repens, autogamy, ii. 381. 

 Potentilla reptans, runner, i. 664. 

 Poterium, pollen discharge, ii. 145. 



— protogynous, ii, 313. 



Poterium polygamum, polygamous flower- 

 heads, ii. 294. 

 Pothoidepe, climbing habit, ii. 745. 

 Pothos, vegetative propagation, ii. 800. 

 Pottia intermedia, protonema, ii. 799. 

 Prangos, seed protection, ii. 450. 

 Pressure and turgidity, i. 511. 

 Prickles, protective, i. 433. 



— sorts of, i. 439. 

 Prickly Pear, See Opuntia. 

 Primeval forest, Ceylon, ii. 741. 

 Himalayas, ii. 743. 



Primordial utricle, meaning of term, i. 25. 

 Primula, flowers after pollination, ii. 286. 



— bcterostyly, ii. 302. 



— hybrids, ii. 585. 



— in cultivation, ii. 575. 



— pull of roots, i. 767. 



Primula Auricula and P. GamioUca, colour 

 of flowers and hybrid, ii. 567. 



autogamy, ii. 396, 397. 



dichogamous blossoming, ii. 312. 



heterostyly and hybridization, ii. 316. 



scent, ii. 200. 



Primula Cashmiriana, protection of pollen 



from wet, ii. 111. 

 Prlmxila Clusiana and Uromyces Primula 



integrifoliae, ii. 525. 

 Primula denticulata, protection of pollen 



from wet, ii. 111. 

 Primula elatior and hybridization, ii. 404. 



effect of mutilation, ii. 517. 



Primula farinosa, efEectof mutilation, ii. 517. 



wax on leaves, i. 291. 



Primula glutinosa, autogamy, ii. 396. 



hybridization, ii. 404. 



sticky foliage, ii. 236. 



Primula hirsuta, prey capturing, i. 155. 

 Trimula japonica, antholysis, ii. 79. 



green flower, ii. 86. 



Primula longiflora, autogamy, ii. 396, 397. 

 Primula minima, autogamy, ii. 396. 

 Primula oflicinalis, heterostyly and differ- 

 ences in pollen-grains, section, ii. 405. 



hybridization, ii. 404. 



Primula siuensis, absorption of ammonia, i. 



65. 

 Primula veris. See P. officinalis. 

 Primulacese, ii. 770. 



— autogamy in, ii, 341. 



— heterostyly in, ii. 302. 



— hybrids among, ii. 585. 



— pollen and probosces of insects, ii. 248. 



— protection of pollen, ii. 118. 



— rolling of leaf, i. 348. 



— variety of venation, i. 635. 

 Privet. See Ligustrum vulgare. 

 Probosces of insects and pollen, ii. 248. 

 Procumbent stem, characteristics, i. 661. 

 Projection of seeds, range of, ii. 839. 

 Prolepsis, doctrine of, i. 8. 



— In formation of " Rose WiUows", ii. 546. 



— in Witches' Broom, ii. 527. 

 Promycelium, of Hemibasidii, ii. 675. 

 Pronuha yuccasella, pollination of Yucca, ii 



157, 245. 

 Propagation, artificial, from roots, ii. 27. 



— by brood-bodies and fertilization respect- 



ively, ii. 70. 



