INDEX. 



969 



Pollen-grains of Abietinepe, ii. 721. 



"oil on, ii. 101. 



sculpturing, ii. 100. 



specific differences, ii. 490. 



visciu, ii. 101. 



Pollen-masses, concealment and withdrawal, 



ii. 252. 

 Pollen-mother-cells, ii. 96, 

 PoUen-8ac=microsporaugium, ii. 478. 

 Pollen-sacs, dehiscence, ii. 91. 

 Pollen tetrads and sticky stigmas, ii. 283. 

 Pollen 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, 

 Pollinia, nature of, ii. 97. 



— of Epipactis latifolia, ii. 255. 



— of Epipogium apbyllum, ii, 226. 



— of Phalsenopsis Schilleriana, ii. 227. 

 Polyembryony, in Angiosperms, ii, 468. 

 Polygala amara, stamen, ii. 87. 

 Polygalacefe, cleistogamy in. ii. 393. 



— staminal filament, ii. 88. 

 Polygonacete, phyllocladous species, i. 334. 



— rolling of leaf, i. 348. 

 Polygonatumverticillatum.mechanicaltissue 



aiTangemeut, 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 bulbifenim, bulbils, ii. 454. 

 Polygonum Convolvulus, twining, i. 682, 6S5. 

 Polygonum Siebuldi, seed-dispersal, ii. 853. 

 Polygonum virgiuicum, seed-dispersal, ii. 841, 

 Polygoniun viviparum, dispersal of bulbils, 



u. 454, 819. 



ice-melting, i. 500. 



rolling of leaf. i. 348. 



Polj'hedra, of Hydrodictyon, ii. 641. 

 Polyi)etalae, floral characteristic, ii. 748. 



— of Bentham and Hooker, ii. 604. 

 Polyphagus Euglenae, i. 169; ii. 668. 



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



Polypodiacese, description, ii. 706, 



— sporangium, ii, 705. 



Polypodium glaucophyllum, was on fronds, 



i. 292. 

 Polypodium serpens, sporogenous frond, ii. 



11. 

 Polypodium vulgare, epiphytic, ii. 705. 

 Polyporete, hymenium, ii. 688. 



— hyphte of, i. 165. 



Polyponis, destructive nature, ii. 688. 



— fossil remains, ii. 614. 

 Polyporus annoaus, ii. 688, 

 Polyporus fomeutarius, PI. XIV. ii. 688. 

 Polyporus igniarius, ii. 688. 

 Polyporus perennis, ii. 685. 



Polyporus sidfureus, behaviour of mycehum, 

 i. 107. 



cause of mouldering in wood, i. 263. 



Polysiphonia, luminosity, i. 3S8. 

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

 Polytrichaceie, 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. 



Pomacese, persistent receptacle, ii. 435. 

 Pondweeds. See Potamogeton. 

 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 pyramidaUs, 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. 



linear 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 hygronietrica, leaf movements, i. 



339. 

 Porogamic fertQization, ii, 412. 

 Porous cells, of Leucobrrum, Sphagnum 

 and Lselia gracilis, i. 219. 



— dehiscence of pollen-sacs, ii. 92. 



— envelope of Orchid aerial roots, esfoUa- 



tion in soil, i. 223. 

 Porphyra, habit, i. 587. 

 Portulaca, pollen-grains, ii. 98. 



— propagation of hybrids, ii. 556, 

 Portulaca grandiflora, &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. 

 Potamogetaceae, 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 heterophyllus, &c., heterophyl- 

 lous, i. 668. 



Potamogeton lucens, amount 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. 7'J. 



— Marsh, See Comanim 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. 

 Potentilla repens, autogamy, ii. 381. 

 Potentilla reptans, runner, i. 664. 

 Poterium, pollen discharge, ii. 145. 



— protogynous, ii. 313. 



Poterium polygamum, polygamous flovver- 



beads, ii. 294. 

 Pothoide*. 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. 



— hcterostyly, ii. 302, 



— hybrids, ii, 585. 



— in cultivation, ii. 575. 



— pull of roots, i. 767. 



Primula Auricula and P. Camiolica, colour 

 of flowers and hybrid, ii. 567. 



autogamy, ii. 396. 397. 



dichogaraous blossoming, ii. 312. 



heterostyly and hybridization, ii. 316. 



scent, ii. 200. 



Primula Cashmiriana, protection of pollen 



from wet, ii. 111. 

 Primula Clusiana and Uromyces Primulae 



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, effect of mutilation, ii. 517. 



wax on leaves, i. 291. 



Primula glntinosa, autogamy, ii. 396. 



hybridization, ii. 404. 



sticky fohage, ii. 236, 



Primula hirsuta, prey capturing, i. 155, 

 Primula japonica, antholysis, ii. 79. 



green flower, ii. 86. 



Primula longiflora, autogamy, ii. 396, 397. 

 Primula minima, autogamy, ii. 396. 

 Primula officinalis, heterostyly and differ- 

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



byhridizatioD, ii. 404. 



Primula sinensis, absorption of ammonia, i. 



65. 

 Primula veris. See P. officinalis. 

 Primulaceje, 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 Willows", ii. 546. 



— in Witches' Broom, ii. 527. 

 Promycelium, of Hemibasidii, ii. 675. 

 Pronuba yuccasella, polUnation of Yucca, ii, 



157, 245. 

 Propagation, artificial, from roots, ii. 27. 



— by brood-bodies and fertilization respect- 



ively, ii. 70. 



