INDEX. 



Pollen-grains of Abietinese, ii. 721. 



oil on, ii. 101. 



sculpturing, ii. 100. 



specific differences, ii. 490. 



viscin, ii. 101. 



Pollen-masses, concealment and withdrawal, 



ii. 252. 

 Polleu-mother-cells, ii. 96. 

 Pollen-sac=microsporaugiura, ii. 478. 

 Pollen-sacs, dehiscence, ii. 91. 

 I'ollen 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 Eock-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 aphyllum, ii. 226. 



— of Phalaenopsis Schilleriana, ii. 227. 

 Polyerabryony, in Angiosperms, iL 468. 

 Polygala amara, stamen, ii. 87. 

 Polygalacese, cleistogamy in, ii. 393. 



— staminal filament, ii. 88. 

 Polygonacese, phyllocladous species, i. 334. 



— rolling of leaf, i. 348. 

 Polygouatumverticillatum,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, 6S5. 

 Polygonum Sieboldi, seed-dispersal, ii. 853. 

 Polygonum virginicum, seed-dispersal, ii. 841. 

 Polygonum viviparum, dispersal of bulbils, 



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 Euglenae, i. 169; ii. 668. 



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



Polypodiacese, 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, hymenium, ii. 688. 



— hyphse 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. 

 Polytrichaceie, epiphragm, ii. 703. 



— teeth of peristome, ii. 703. 

 Polytrichnm, apophysis, ii. 702. 



— folding of leaf, i. 346. 



— green absorptive cells, i. 85. 



Polytrichum, mechanism for water-abrorp- 

 tion, i. 218. 



— phyllotaxis, i. 408. 



— spore-dispersal, ii. 814. 

 Polytrichum commune, leaf, Bections i 



346. 



sporogonium, &c., 11. 15. 



Pomaceaj, persistent receptacle, ii. 435. 

 Pondweeds. See Polamoqeton. 

 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. 



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 Laelia g< acilis, i. 219. 



— dehiscence of pollen-sacs, ii. 92. 



— envelope of Orchid aiirial roots, exfolia- 



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 fragraus, flower and visitors, ii. 



2:15. 

 Potamogetacese, embryos, ii. 738. 



— habit and pollination, ii. 738. 

 Potamogeton, adaptation to environment, i. 



424. 



— dichogamy, ii. 135. 



— pollen dispersion, i 



— pollination, ii. 133. 

 Potamogeton crispus, 



hibernating shoots, 



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, e.xperimental determination, i. 261. 



Potamogeton nutans, position of stomata on 

 leaves, i. 280. 



Potassium, in ash of plants, i. 66. 



— salts of, accumulation through planta, L 



261. 

 Potato, sprouting, i. 494, 562. 



— starch, i. 459. 



105. 



.739. 



551, 552. 



— recopUotJui uitU t.«i;«cU, n. ,"■ 



— Mamh. 8«e Comamm ixiluifr. 



— ncot.'.ry, ii 174 



Pot.-,.' . ^,„,, „ ML 



Pot.v ■ 



Pot- n ' i CO. 



Pot.,,' .„ ,74. 



m:cUr> - 1 



Potonlilla nil . sai 



Poteutlllari'j.. ■ m\. 



Potentilla ri'iit.iiiH. r'ir,,,.r, i OH 

 Potcrium, iH.lk-n ill*.-liar»e, II. liS. 



— protogynouii, ii. 313. 



Poteriura polyKuuiutn, poljrgamoui flotnr- 



heads, ii. 204. 

 Pothoidew, climbing linbit, II 745 

 PothoB, TcguUtive propagati.in, 11 800. 

 Pottia intermedia, protooriiis. ii. 799. 

 Praiigos, seed protection, it. liO. 

 Pressure and turgidity. i. 511. 

 Prickles, proU-ctive. i. 433. 



— sorts of, i. 439. 



Prickly Pear. See Opuntia. 

 Primeval forest, Ceylon. IL 741. 



Himalaya.^. 11. 743. 



Primordial utricle, meaning of l^rm. I. 25. 

 Prinmla, flowers after poUiuatlua. Ii. J86. 



— 1,' teroBtyly, II. 302. 



— hybrids, ii. 585. 



— in cultivation, ii. 575. 



— pull of roots, i. 767. 



Primula Auricula and P. CamlnllcA, oolow 

 of flowers and hybrid. Ii. J67. 



autogamy, il. 396. 397. 



dichogamoiu bloasoming, II. 311 



heterostyly and byhri.llzatlon, U. 311 



scent, ii. 200. 



Primula Cashmiriana, protection of poU«a 



from wet, Ii. 111. 

 Prjuula Clusiana and Uromyoe* Primula 



integrifoliai, ii. 525. 

 Primula denticulata, protectioo of poUco 



from wet, ii. 111. 

 Primula elatior and hybridlzatioo. U. ¥H. 



effect of mutilation, Ii. 517. 



Primula farinosa, effect of mutilation. U. 517. 



wax on leaves, i. 291. 



Primula glutinoBO, autogamy, 11. 396. 



hybridization, II. 40t 



sticky foliage, il. 236. 



Primula hirsuta, prey capturing, i. IS5. 

 Primula japonica, autliolym, a 79. 



green flower, ii. 86. 



Primula longiflora, autogamy, it 394, 3W. 

 Primula minima, autogmmy, II. 391 

 Primula otUcinalis, hetorrmyly and dltfer- 

 euo-s in pollengraiui. tccUon. Il ¥A 



hybridization. II. 404. 



Primula sinensis, abaorption of ammonu, L 



65. 

 Primula Tcria. Soo P. offieinaiU. 

 Primulac'!''. il 770 



— In 



_p,.: ..finMeu.li.Nl 



-prot._L!i"ii.'f I ::'i>, Ii. Ul 



— roUIng of leaf. I. 34& 



— variety of venation. I. 635 

 Privet. S.-0 UjuJlrvm rvS^r*. 

 Pmlwsccs of lUM-ctA an. I i-.llon. 11 J«* 

 Procumbent iU'iii. cliiu«.lrr,«lli-». i <*J 

 ProJtvii..,...f .. . ; :■•■.■ '■ il !«» 

 Pn.l. 1 



-I,. I "Ml M* 



Pron..vo'.,„:„. ': ., .. crS 



Pronuba )ucia»vlia. ix^muMJ-ui i-* Yurtia. U 



157. 245 

 Pro|>aga(ion, artificial, from rrava. tl T! 



— by broodlodlai and fartlllmtloo m(wc4 



iToly. U. 70. 



