INDEX. 



969 



Pollen-grains of Abietinete, 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. 

 Pollen-sac =microsporangiura, 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 Epipaotis latifolia, ii. 255. 



— of Epipogium aphyllum, ii. 226. 



— of Phalienopsis Schilleriana, ii. 227. 

 Polyembryony, in Angiosperms, ii. 468. 

 Polygala amara, starilen, ii. 87. 

 Polygalaceie, cleistogamy in, ii. 393. 



— staminal filament, ii. 88. 

 Polygonacefe, phyllocladous species, i. 334. 



— rolling of leaf, i. 348. 



Polygonatum verticiUatum, median ical 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 Siebokli, seed-dispersal, ii. 853. 

 Polygonum virginicum, seed-dispersal, ii. 841. 

 Polygonum viviparum, dispersal of bulbUs, 



ii. 454, 819. 



ice-melting, i. 500. 



rolling of leaf, i. 348. 



Polyhedra, of Hydrodictyon, ii. 641. 

 Polypetalse, floral characteristic, ii. 748. 



— of Bentham and Hooker, ii. 604. 

 Polyphagus Euglenie, i. 169 ; ii. 668. 



life-historj', i. 170 ; ii. 671. 



Polypodiaoese, description, ii. 706. 



— sporangium, ii. 705. 



Polypodium glaucophyllum, wax on fronds, 



i. 292. 

 Polypodium serpens, sporogenous frond, ii. 



11. 

 Polypodium vulgare, epiphytic, ii. 705. 

 Polyporese, hynienium, ii. 688. 



— hyphie of, i. 165. 



Polyporus, destructive nature, ii. 688. 



— fossU remains, ii. 614. 

 Polyporus annosus, ii. 688. 

 Polyposis fomentarius, PI. XIV. ii. 688. 

 Polypoi-us igniarius, ii. 688. 

 Polyporus perennis, Ü. 685. 



Polyporus sulfureus, behaviour of mycelium, 

 i. 167. 



cause of mouldering in wood, i. 263. 



Polysiphonia, luminosity, i. 388. 

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

 Polytrichaoete, 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. 



— phyUotaxis, i. 408. 



— spore-dispersal, ii. 814. 

 Polytrichum commune, leaf, sections, i. 



346. 



sporogonium, &c., ii. 15. 



Pomaceje, persistent receptacle, ii. 435. 

 Pondweeds. See Potamoijeton. 

 Poutederia 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 wooUy hairs, i. 



354. 



dimensions, i. 722. 



mycelial mantle of roots, i. 250. 



pistillate flowers and Taphrinaaurea, ii. 



524. 

 Populus nigra, adventitious buds, i. 766. 

 plants and animals which live upon, 



within, or in association with, i. 256. 

 Populus pyramidahs, venation, i. 631. 

 Populus tremula and nut-gaUs of Saperda 



populnea, ii. 543. 

 development of adventitious root-buds, 



ii. 26. 



elastic petioles, i. 428. 



leaf, absorption-cups in surface view 



aüd 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 hygrometrica, leaf movements, i. 



339. 

 Porogamic fertilization, ii. 412. 

 Porous cells, of Leucobryum, Sphagnum 

 and Lselia gracilis, i. 219. 



— dehiscence of poUen-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 graudiflora, &c., opening and 



closing, ii. 212. 

 Portulaca oleracea, weather and autogamy, 



ii. 391. 

 Posidonia, poUen 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 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. 76. 



— Marsh. See Comarum pahistre. 



— 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 flower- 

 heads, ii. 294. 

 Pothoideie, 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. 



— hi terostyly, 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. 



dichogamous blossoming, ii. 312. 



heterostyly and hybridization, ii. 316. 



scent, ii. 200. 



Primula Cashmiriana, protection of poUeu 



from wet, ii. 111. 

 Primula Clusiana and Uromyces Primulie 



iutegrifolise, 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 glutinosa, autogamy, ii. 396. 



hybridization, ii. 404. 



sticky foliage, ii. 236. 



Primula hirsuta, prey capturing, i. 155. 

 Primula japonica, antholysis, ii. 79. 



green flower, ii. 86. 



Primula lougiflora, autogamy, ii. 396, 397. 

 Primula minima, autogamy, ii. 396. 

 Primula oflicinalis, heterostyly and differ- 

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



hybridization, ii. 404. 



Primula siuensis, 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, 1. 635. 

 Privet. See Ligiistrum 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. 

 Pronuba yuccasella, pollination of Yucca, iL 



157, 245. 

 Propagation, artificial, from roots, ii. 27. 



— by brood-bodies and fertilization respect- 



ively, ii. 70. 



