INDEX. 



969 



Pollen-grains of Abietine»}, il. 721. 



oil OD, Ü. 101. 



sculpturing, ii. 100. 



specific differences, ii. 490. 



Tiscin, iL 101. 



Pollen- ma.'^ses, concealment and withdrawal, 



iL 253. 

 PoUen-motber-cells, ii. 96. 

 PoUen-8ac=niicrosponingiura, ii. 478. 

 PoUen^sacs, dehiscence, ii. 91. 

 Pollen tetrads and sticky stigmas, ii. 283. 

 Pollen transference, exploslvo apparatus, ii. 



266. 267. 



percwssiTe apparatus, ii. 261. 



sprinkling apparatus, ii. 271. 273, 275. 



PolU-n-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. 1*29. 



— and fertilization, interval between, ii. 285. 



— and insects, iL 95. 



— and withering of corolla, iL 286. 



— by kangaroos, ii. 230. 



— conditions of successful, iL 405. 



— of Vallisneria, ii. 132. 



— relation to fertilization, ii. 401. 

 PoUinia. nature of, ii. 97. 



— of Epipactis latifolia, iL 255. 



— of Epipogiura aphyllum, ii. 226. 



— of Phalsenopsis Schilleriana, ii. 227. 

 Polyembryony, in Angiosperms, ii. 463. 

 Polygala amara, stamen, ii. 87. 

 Polygalacese, cleistogamy in, ii. 393. 



— staminal filament, ii. 88. 

 Polygonaceje, phyllocladous species, i. 334. 



— rolling of leaf, i. 348. 

 PolygonatumTerticiUatum.mechanical tissue 



arrangement, i. 730. 

 Polygonum amphibium, leaf-rosette, L 412. 

 protection of stomata from moisture, i. 



294. 

 Polygonum Bistorta. effect of mutilation, ii. 



517. 



geitonogamy, ii. 327. 



Polygonum bulbiferum, bulbils, ii. 454. 

 Polygonum CodtoItuIus, twining, L 682. 685. 

 Polygonum Sieboldi, Beed-disi)ersal, ii. 853. 

 Polygonum virginicum. seed-dispersal, ii. 841. 

 Polygoniun viviparum, dispersal of bulbils, 



Ü. 454, 819. 



ice-melting, i. 500. 



rolling of leaf, L 348. 



Polyhedra, of Hydrodictyon. ii. 641. 

 Polypetalse, floral characteristic, ii. 748. 



— of Bentbam and Hooker, ii. 604. 

 Polypbagus Euglen^, i. 169: ii. 668. 



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



PolypodiacesB, description, ii. 706. 



— sporangium, ii. 705. 



PolyiKKlium glaucophyllum, wax on fronds. 



L292. 

 Polypodium serpens, sporogenous frond, ii. 



U. 

 Polypodium vulgare, epiphytic, iL 705. 

 Polyporese, hymenium, iL 688. 



— bypba» of, i. 165. 



Polypoms, destructive nature, iL 688. 



— fofisU remains, iL 614. 

 Polytwrus annosus, ii. 688. 

 Polypoms fomentaritw, PI. XIV. iL 688. 

 Poljrporus igniarius, iL 688. 

 Polypoms [«rennis, ii. 685. 



PoljTKjrua sulfureua, behaviour of mycelium, 

 i. 167. 



cause of mouldering in wood, L 263. 



Polysiphonia, luminosity, i. 388. 

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

 Pjlytrichaceaj, epiphragm. ii. 703. 



— teeth of peristome, iL 703. 

 Polytrichum, apophysis, ii. 702. 



— folding of leaf, i. 346. 



— green absorptive cell», 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., iL 15. 



Poniaccft). persistent receptacle, ii. 435. 

 Pondwecds. See Potamo'jfton. 

 Poutederia crassipes, floats, i. 638, 669. 

 Poplar, Buitaliility as host for Mistletoe, i. 



209. 

 Poppy, in Egj-ptian tombs, i. 580. 



— motamorphoses of the leaves, i. 11. 

 Populus. dis-iie mi nation, i. 614. 



— numerous hybrids, ii. 583. 



— pollination, iL 133. 



— porogamic fertilization, ii. 413. 



— protection of pollen, ii. 119. 



— water-absorption, direct from atmosphere, 



L238. 

 Populus alba, age, i. 722. 

 deciduous protective woolly hairs, L 



354. 



dimensions, i. 722. 



mycelial mantle of roots. L 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, L 631. 

 Populus tremula and nut-galls of Saperda 



populuea, iL 543. 

 development of adventitious root-buds, 



ii. 26. 



elastic petioles, i. 428. 



leaf, absorption -cups in surface view 



and section, i. 233. 



linear arrangement oE offshoots, ii. 795. 



normal and sucker leaves, ii. 515. 



seed, ii. 423. 



two kinds of leaves, L 238. 



variety in asexual shoots, ii. 471. 



Porlieria hygrometrica. leaf movements, i. 



339. 

 Porogamic fertilization, ii. 412. 

 Porous cells, of Leucobryum, Sphagnum 

 and Lselia gracilis, L 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. 556. 

 Portulaca grandiflora, ic, opening and 



closing, ii. 212. 

 Portulaca oleracea, weather and autogamy, 



Ü. 391. 

 Posidouia, pollen and pollination, ii. 104. 

 Posoqueria fragrans, flower and visitors, ii. 



225. 

 Fotamogetaces, 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. L 551. 552. 



pollination, iL 148. 



— — protogynous, ii. 311. 

 Potamogeton fluitans. habit and habitat, ii. 



502. 



length, i. 388. 



Potamogeton heterophyllus, tie, heterophyl- 

 lous, i. 668. 



Potamogeton lucens. amount of lime forma- 

 tion, experimental determination, L 261. 



Potamogeton natans, position of stomata on 

 leaves, i. 280. 



Potassium, in ash of plants, L 66. 



— salts of, accumulation through plants, i. 



261. 

 Potato, sprouting, {. 494. 562. 



— starch, L 459. 



Potato-disease, duo to Phytophthora infes- 



tans. iL 669. 

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



rtui)ersiitiou concerning, ii. 810. 



Potontilla, hybrids, inexhaustible, iL 585. 



— receptacles and carpels, ii. 76. 



— Marsh. See Comarum palustre. 



— nectary, ii. 174. 



Potontilla atrosanguinea, autogamy, iL 381. 

 Potentilla cinerea, hairs, i. 322. 

 PotcntillaOIusiana, procumbent, L 662. 

 Potentilla micrantha, flower, ii. 174. 



nectary coiioi-iilniont. ii. 181. 



roteutilla nitida, procumbent, i, 662. 

 Potentilla repens, autogamy, ii. 381. 

 Potentilla n-ptans, runner, i. 664. 

 Püterium, pollen discharge, ii. 145. 



— protogj'nuus. ii. 313. 



Poterium polygamum, polygamous flower- 

 beads, iL 294. 

 Potboide«. climbing habit, ii. 745. 

 Pothos. vegetative propagation, ii. SOO. 

 Pottia intermedia, protonema, ii. "99. 

 Prangos. seed protection, ii. 450. 

 Pressure and turgidity, i. 5U. 

 Prickles, protective, i. 433. 



— sorts of, i. 439. 

 Prickly Pear. See Opuntm. 

 Primeval forest, Ceylon, IL 741. 

 Himalayas, ii. 743. 



Primordial utricle, meaning of term. i. 25. 

 Primula, flowers after pollination, iL 286. 



— hcterostyly, iL 302. 



— hybrids, ii. 585. 



— in cultivation, ii. 575. 



— pull of roots, L 767. 



Primula Auricula and P. Camiolica. colour 

 of flowers and hybrid, ii. 567. 



autogamy. iL 396. 397. 



dichogamous blossoming, ii. 312. 



heterostyly and hybridization, iL 316. 



scent, ii. 200. 



Primula Cashmiriana, protection of poUen 



from wet, ii. 111. 

 Primula Clusiana and Uromyces PrimuUe 



integrifolia), iL 525. 

 Primula denticulata, protection of pollen 



from wet, ii. 111. 

 Primula elatior and hybridization, iL 404. 



effect of mutilation, ii. 517. 



Primula farinosa, effect of mutilation, iL 517. 



wax on leaves, i. 291, 



Primula glutinosa, autogamy, ii. 396. 



hybridization, ii. 404. 



sticky fohage, ii. 236. 



Primula hirsuta. prey capturing, i. 155. 

 Primula japonica, antholysis, ü. 79. 



green flower, ii. 86. 



Primula longiflora, autogamy, ii. 396, 397. 

 Primula minima, autogamy, ii. 396. 

 Primula officinalis, heterostyly and differ- 

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



hybridization, ii. 404. 



Primula sinensis, absorption of ammoni<i, L 



65. 

 Primula veris. See P. officinalis. 

 Primulaceaj. ii. 770. 



— autogamy in, ii. 341. 



— heterostyly in, ii. 302. 



— hybrids among, ii. 585. 



— pollen and probosce.s of insects, Ii. 248. 



— protection of pollen, ii. 118. 



— rolling of leaf, L 348. 



— variety of venation, i. 635. 

 Privet. See Li'jitstrum vulgare. 

 Proboscea of insects and pollen, ii. 248. 

 Procumbent stem, characteri sties, 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, iL 675. 

 Pronuba yuccasella, pollination of Yuoca, iL 



157. 245. 

 Propagation, artiflcfal, from roots, il. 27. 



— by brood-bodies and fertilization respect- 



ively, ii. 70. 



