972 



INDEX. 



Ehizophora Munt;Ie, branch wiih tlowera 



and fruit, ii. 451. 

 Rhizophore, uf äelaginella, ii. 715. 

 Kbizopburese, polleu -chambers, ii. 90. 

 Rhizopuda, prey of Utricularia moutana, i. 



123. 

 Rhizopus nigricans, spores and heat, i. 554. 

 Rhizotomoi, ancient tirecian guild of herbal- 



isU, i. 2. 

 Rhodiola rosea, diEtributiou of sexes, ii. 299. 

 Rhoditea eglaoteriai. pea-like gall, ii. 552, 

 Rbodites Kosfe, and BedegiiarH, ii. 552. 



gall on Ruse-leaf, Ü. 533. 



Rbodites spinosissima, gall, ii. 552. 

 Rhododendron, and animals, i. 432. 



— pollen tetrads, ii. 97. 



— protection of polleu, ii. 118. 



— sticky stigmas, ii. 282. 

 Rhododendron Chamsecistus, cross-fertiliza- 

 tion, 1. 301. 



insects and pollen, ii. 245. 



protogynous, ii. 311, 



viscio of pollen-grains, ii. 101. 



Rbododeni-lrun ferrugineuui and R. hirsu- 

 tuni, hybrid of, ii. 5G4. 



doubling of flower through Gall-gnat, 



ii. 549. 



galls of Exobasidium, ii. 520. 



honey protection, ii. 239. 



influence of gall-mites, ii. 550. 



nectaries, ii. 177. 



scroll-gall, Ü. 530. 



Rhododendron hirsutum, and snow, i. 550. 



and summer cold, i. 545. 



galls of Exobasidium, ii. 520. 



hooey protection, ii. 239. 



leaf, under side and section, i. 232, 



nectaries, ii. 177. 



pollen-tetrads with viscinthreads.ii.lOl. 



protandrous, ii. 311. 



scroU-gaU, ii. 530. 



weather and self- and cross -pollinatiou, 



ii. 391. 



Rhododendron intermedium, autogamy, ii. 

 589. 



Rhododendron Lapponicum, cold resistance, 

 i. 543. 



Rhododendron Ponticum, and cold, i. 543. 



Rhododendrons, Alpine, PI. X. 



sheltered polleu, ii. 107. 



Rhodopbycea;, ii. 606, 620. 



Rhodoracete, ii. 768. 



Rhodotypua, reserve-buds, ii. 33. 



Rhopalocnemis phalloides, geugraphical dis- 

 tribution, i. 193. 



Java, i. 191. 



Rhubarb, äee Rlieum. 



Rhus Cotinus, antbocyanin 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 Typhinuui, PI. V. i. 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



Ribbon-growths, plant community, ii 888, 

 893. 



Ribbon-like stems of Liaue, 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. 



Ricciaceai, description, ii. 697. 



Rice, starch, i. 459. 



Richardia, monoecious, ii. 297. 



Richardia aethiopica, coloured bract, ii, 181 



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. 599. 



— staminal filament, ii. 88. 



— Vfuation, i. 632. 



Riciuus communis, crystalloids, i. 457. 



distribution of sexes, ii. 300. 



■ pistillate flower, moncecia, ii. 293. 



Ricin\u communis, seed and embryo, ii. 425. 



seod-dispcrsal, ii. 835. 



spiral vessels and bundle-sheath, i. 471. 



stamen, ii. 87- 



staminate flower, moncecia, ii. 293. 



stem, i. 656. 



Riella helicopliylla, ii. 611, 

 Ring, annual, i. 719. 

 Ringed bark, i. 720. 

 Ringud 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, i. 534. 



reserve-buds, ii. 31. 



scent, ii. 200. 



spines, i. 449. 



Rocbea, functions of hairs, i. 325, 



— water-storing epidermis, i. 329. 

 Rocbea 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. 

 Roemeria, autogamy, ii. 341. 



— stigma, ii. 279. 



Rcemeria violacea, opening and closing, ii. 212. 



Rolling fruits, ii. 849. 



Rout, chief distinctive feature, i. 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^larv», L 



762, 



— shortening and downward pull, i. 770. 



— sorts of, i. 750 et seq. 



— supporting, i. 754. 

 Root-absorption, effect of cold ou, i. 356. 

 Root-buds, i. 766. 



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



formation, i. 579. 



function and structure, i. 763. 



Root-climbers and prostrate stems, i. 708. 

 Root-cortex, functions, i. 762. 

 Root-hairs, i. 87. 



fuugal byphje 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. 



limitation 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, natxure, 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. 



— chlorophyll in. i. 376, 766. 



— cUmbing, characteristics, i. 701. 



— deaxl, source of carbonic aud nitric acids, 



i. 266. 



— forms of, i. 749 et seq. 



Roots, functions and differentiation, i. 76L 



— mechanical force, L 515. 



— of Ficus, i, 755. 



form living bridges, ii. 758, 760. 



— of Lathraia, 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. 



— stilt-like, of Mangroves, i. 759. 



— strap-shaped, i. 107. 

 Roridula, i. 148. 



Roridula dentata, carnivorous in minor de- 

 gree, i. 156. 

 Roridida muscipida, source of name, ii. 235. 

 Roripa, hybridization, ii. 584. 

 Roripa amphibia, aijrial 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 Rbodites Rosse, ii. 537. 



— carjjellary 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. 



— phyllolaxis, i. 400. 



— pollen-grains, ii. 99. 



— prickles, i. 433. 676. 



— protection of pollen, ii. 113. 



— radical shoots, ii. 27. 



— seed dispersal by birds, ii. 444. 



— specific scents, ii. 566. 



— storage of pollen, 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 BanksiBB, myrmecophilous, ii. 233. 

 Rosa canina and galls of Rhoditea Rosse, ii. 

 553. 



cotyledons, i. 621. 



scent, ii. 204. 



Rosa centifolia, scent, U. 204. 



Rosa cinnamomea, scent, ii. 204. 



Rosa Gallica, scent, ii. 204. 



Rosa pimpiuellifolia, scent, ii. 204. 



Rosa rubrifolia, 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. 



— (^stribution 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 .^7m«£a(taiAi>i-ocA«;iIica. 

 Rose-root. See Khodiola i-osea. 

 Rose-trees, winter treatment, i. 550. 

 "Rose Willows", nature of, iL 646. 

 Roses, breeding of. ii. 555. 



— double, pollination of, ii. 403. 



— number, ii. 555. 



— transition from stamens to petals, ii. 86. 

 Rosettes, of leaves, i. 410. 



Ross, Captain John, observes Red-snow in 



Arctic America, i. 38. 

 Rostellum, of Epipogium aphyllum, ii. 226. 



— of Orchids, ii. 253. 

 Rotang, barbs, i. 677. 



— climbing habit, i. 362. 



— mechanical tissue, i. 732. 



— shoot apices, i. 676- 

 Rotangs, in Java, i. 675. 



— length, i. 676. 



Rotifer, in Fmllania pitcher, ii 698. 



