972 



INDEX. 



Rhizophora Mangle, brancli with flowers 



and fruit, ii, 451. 

 fthizophore, of Selaginella, ii. 715. 

 Rhizophoreae, pollen -chambers, ii. 90. 

 Ehizopoda, prey of Utricularia montaua, i. 



123. 

 Rhizopus nigricans, spores and heat, i. 554. 

 Rhizotomoi, ancient Grecian guild of herbal- 



iBts, i. 2. 

 Rhodiola rosea, distribution of sexes, ii. 299, 

 Rhodites eglanteri^, pea-like gall, ii. 552, 

 Rhodites Rosee, and Bedeguars, ii. 552. 



gall on Rose-leaf, ii. 533. 



Rhodites spioosissima, gall, ii. 552. 

 Rhododendron, and animals, i, 432. 



— pollen tetrads, ii. 97. 



— protection of pollen, ii, 118, 



— sticky stigmas, ii. 282. 

 Rhododendron Chamseciatus, cross-fertiliza- 

 tion, i, 301, 



insects and poUen, ii, 245. 



protogynous, ii, 311. 



viscin of polleu-graine, ii. 101. 



Rhododendron ferrugineum and R. hirsu- 



tum, hybrid of, ii. 564. 

 doubling of flower through Gall-gnat, 



ii. 549. 



gaUs of Bxobasidium, ii. 520. 



honey protection, ii. 239. 



influence of gall-mites, ii. 550. 



nectaries, ii. 177. 



— — scroll-gall, ii. 530. 

 Rhododendron hirsutum, and snow, 1. 550. 

 and summer cold, i. 545. 



galls of Eiobasidium, ii. 520. 



honey protection, ii, 239. 



leaf, under side and section, i. 232, 



nectaries, ii. 177. 



pollen-tetrads with viacln threads.ii.lOl. 



protandrous, ii. 311. 



scroll-gaU, ii, 530, 



weather and self- and crosa-pollination, 



. ii. 391. 



Rhododendron intermedium, autogamy, ii. 

 589. 



Rhododendron Lapponicum, cold resistance, 

 i. 543. 



Rhododendron Ponticum, and cold, i. 543. 



Rhododendrons, Alpine, PI. X. 



sheltered pollen, ii. 107. 



Rhodophyceas, ii. 606, 620, 



Rhodoracese, ii. 768. 



RhodotypUB, reserve-buds, ii, 33. 



Rhopalocnemis phalloides, geographical dis- 

 tribution, i. 193. 



Java, i. 191. 



Rhubarb. See Rhemn. 



Rhus Cotinus, anthocyanin in buds, i. 484. 



distribution of sexes, ii, 297. 



hairy flower-stalks, ii. 858. 



Rhus semialata, Aphis galls, ii. 535. 



Rhus Toxicodendron. PI. V. i, 488. 



Rhus Typhinum, PI. V. i, 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



Ribbon-growths, plant community, ii. 888, 

 893. 



Ribbon-like stems of Liane, i. 475. 



Ribes alpinum, distribution of sexes, ii. 299. 



pocket-galls on, ii. 532. 



Ribes aureum, scent, ii. 201. 



Ribes Grossularia, flower, ii. 236. 



Ribes rubrum, flower, ii. 173. 



RicciacesB, description, ii. 697. 



Riee, starch, i. 459. 



Richardia, monoecious, ii. 297. 



Richardia sethiopica, coloured bract, ii. 184. 



Richmond, Virginia, U.S.A., Diatom de- 

 posit, ii. 627, 



Ricinus, cotyledons in germination, i, 610, 



— protection of pollen, ii. 124, 



— protogynous, ii. 313, 



— seed, section, i. 699, 



— staminal filament, ii. 88. 



— venation, i. 632. 



RiciijuB communis, crystalloids, i. 457. 



distribution of sexes, ii. 300. 



pistillate flower, moncecia, ii. 293. 



Ricinus communis, seed and embryo, ii. 425. 



seed-dispersal, ii. 835. 



spiral vessels and bundle-sheath, i. 471. 



stamen, ii. 87. 



staminate flower, moncecia, i:. 293. 



stem, i. 656. 



Riella helicophylla, ii. 611. 

 Ring, annual, i. 719, 

 Ringed bark, i. 720. 

 Ringed tendrils, i. 694. 

 Ringing, effect of, i. 480. 



— experiment, and ascent of sap, i. 276, 

 "Ripened" wood, i. 552, 



Rivers, self-purification, i. 265. 

 Rivina, pollen-grains, ii. 99. 

 Rivularia, ii. 622. 



Robinia Pseudacacia, flowering and foliage, 

 i. 562. 



leaf, diurnal positions, 1. 534. 



reserve-buds, ii. 31. 



scent, ii. 200. 



spines, i. 449. 



Rochea, functions of hairs, i. 325. 



— water-storing epidermis, i. 329. 

 Rochea falcata, epiphyllous buds, ii. 40, 

 flinty armour, i, 323. 



Rochelia persica, hooked fruit, ii. 873. 

 Rock, substitute for tree-trunks, i. 108. 

 Rocks, decomposition of constituents, i. 83. 



— smooth steep, habitat for various micro- 



scopic plants and Lichens, i. 117. 

 Rcemeria, autogamy, ii. 341. 



— stigma, ii. 279. 



Rcemeria violacea, opening and closing, ii. 212. 



RoUmg fruits, ii. 849. 



Root, chief distinctive feature, 1. 767. 



— elevating power, i, 770, 



— formation due to external stimulus, i. 771. 



— hydrotropism, i. 775. 



— movements, i. 772, 776. 



— of Ferns, apical-cell, i. 579. 



— origin, i. 766. 



— protection from mice and insect-larvse, i. 



762. 



— shortening and downward pull, 1. 770. 



— sorts of, i. 750 et seq. 



— supporting, 1. 754. 

 Root-absorptioh, effect of cold on, i. 356. 

 Root-buds, i. 766. 



Root-cap, absence in certain plants, i. 764. 



f onnation, i. 579. 



function and structure, i. 763. 



Root-climbers and prostrate stems, 1. 708. 

 Root-cortex, functions, i. 762. 

 Root-hairs, i. 87. 



fungal hyphae as a substitute for, i. 249, 



length, i. 86. 



of aerial roots of Tree-ferns, i. 224. 



on what development depends, i. 89, 



position and renewal, i. 90. 



retention of earth particles, i. 87. 



thickness of inner coat, i. 88, 



Root-pressure, and transpiration, i. 281, 366. 

 elevation and extrusion of sap through, 



i. 271. 

 force of, experimental determination, 



i. 272. 



in Aroid roots, i. 366. 



Umitatiou of, i. 273, 



Root-shortening, disperses bulbs, ii. 831. 



Root-stock. See Rhizome. 



Root-stocks, resting of desert perennials,i.556. 



Root-system of Mistletoe, shape, i. 209. 



Root-tendrils, nature, i. 694. 



Roots, acid juice of, corrosive power, i. 258. 



— aerial, of Aroids, i. 366. 



of Orchid, i. 221. 



adhering to bark, i. 107. 



— and oxygen, i. 493. 



— aquatic, structure and function, i. 763. 



— artificial propagation from, ii. 27. 



— behaviour in Arctic regions, i. 774. 



— chlorophyU in, i. 376, 766. 



— climbing, characteristics, i. 701. 



— dead, source of carbonic and nitric acids, 



i. 266. 



— forms of, i. 749 et seq. 



Roots, functions and differentiation, i. 761. 



— mechanical force, i, 515. 



— of Ficus, i. 765. 



form living bridges, ii. 758, 760. 



— of Lathrjea, i. 182. 



— of Pedicularis, behaviour, i. 180. 



— of Phanerogams, mechanical changes due 



to, i. 265. 



— poisonous secretions, i, 763, 



— positive geotropism of, i. 88. 



— primary, origin, i. 771. 



— shape, determining factors, i. 757. 



— stilHike, of Mangroves, i. 759. 



— strap-shaped, i. 107. 

 Roridula, i. 148. 



Roridula dentata, carnivorous in minor de- 

 gree, i. 156. 

 Roridula muscipula, source of name, ii. 235. 

 Roripa, hybridization, ii, 584. 

 Roripa amphibia, aerial and submerged 

 leaves, ii. 505, 



and R. sylvestris, hybrid of, ii. 586. 



Roripa palustris, epiphyllous buds, ii. 43. 

 Rosa, aggregate fruit, ii. 436. 



— and ancient crossing, ii. 555. 



— and galls of Rhodites Rosee, ii. 537. 



— carpellary insect platform, ii. 229. 



— double hybrids, ii. 576. 



— effect of grafting, ii, 571. 



— hips, protection against rodents, ii. 444. 



— indumenta of hybrids, ii. 564. 



— innumerable hybrids, ii. 585. 



— leaf with various galls, ii, 533. 



— opening of flower, ii, 211, 212. 



— phyllotaxis, i. 400. 



— pollen-grains, ii. 99. 



— prickles, i. 433, 676. 



— protection of poUen, ii. 113. 



— radical shoots, ii. 27. 



— seed dispersal by birds, ii. 444. 



— specific scents, ii. 566. 



— storage of poUen, ii. 94. 



— vernation, i, 350. 



— weaving stem, i. 672. 

 Rosa alpina, scent, ii. 204. 



Rosa arvensis, duration of flowering, ii. 213. 



scent, ii. 204. 



Rosa Banksiaa, myrmecophilous, ii. 233. 

 Rosa canina and galls of Rhodites Rosse, ii. 

 553. 



cotyledons, i. 621. 



scent, ii. 204. 



Rosa centifolia, scent, ii. 204, 



Rosa cinnamomea, scent, ii. 204. 



Rosa Gallica, scent, ii. 204. 



Rosa pimpineUifolia, scent, ii. 204. 



Rosa rubrif olia, ii. 553. 



Rosa Schottiana, receptacle and carpels,ii.74. 



Rosa Thea, scent, ii. 204. 



Rosacese, ii. 779. 



— autogamy in, ii. 390. 



— dehiscence of pollen-sacs, ii. 92. 



— distribution of sexes, ii. 298. 



— geitonogamy in, ii. 325. 



— Phrygian, i. 444. 



— protogyny in, ii. 310. 

 Rose-chafers, sheltering in flowers, ii. 163. 

 Roseof Jericho, See-47iastat4caAterocAM7itica. 

 Rose-root. See Rhodiola rosea. 

 Rose-trees, winter treatment, i. 550. 

 "Rose Willows", nature of, ii. 546. 

 Roses, breeding of, ii. 555. 



— double, pollination of, ii. 403. 



— number, ii. 555. 



— transition from stamens to petals, iL 86. 

 Rosettes, of leaves, i. 410. 



Ross, Captain John, observes Red-snow in 



Arctic America, i. 38. 

 Rostellum, of Epipogium aphyDum, ii. 226. 



— of Orchids, ii. 253. 

 Rotang, barbs, i, 677. 



— climbing habit, i, 362. 



— mechanical tissue, i, 732. 



— shoot apices, i. 676. 

 Eotangs, in Java, i. 675. 



— length, i. 676. 



Rotifer, in FruUania pitcher, ii. 698. 



