972 



INDEX. 



Bhizophora Mangle, branch with flowers 

 and fruit, ii. 451. 



Bhizophore, of Selaginella, ii. 715. 



EhizophoreBB, polleu-chambers, ii. 90. 



Khizopoda, prey of TJtricularia montana, i. 

 123. 



Rhizopua nigricans, Bpores and heat, i. 554. 



Itbizotomoi, ancient Grecian guild of herbal- 

 ists, i. 2. 



Ehodiola rosea, distribution of sexes, ii. 299. 



E-hodites eglanterise, pea-like gall, ii. 552. 



Ehodites Kosse, and Bedeguars, ii. 552. 



gall on Rose-leaf, ii. 533. 



Rhodites spinosissima, gall, ii. 552. 



Rhododendron, and animals, i. 432. 



— pollen tetrads, ii. 97. 



— protection of pollen, ii. 118. 



— sticky stigmas, ii. 282. 

 Rhododendron Chamsecistus, cross-fertiliza- 

 tion, i. 301. 



insects and pollen, ii. 245. 



protogynous, ii. 311. 



Tiscin of pollen-grains, ii. 101. 



Rhododendron ferrugineum and R. hirsu- 

 turn, hybrid of, ii. 564. 



doubling of flower through Gall-gnat, 



ii. 549. 



galls of Exobasidinm, ii. 520. 



honey protection, ii. 239. 



influence of gall-mites, ii. 550. 



nectaries, ii. 177. 



scroll-gall, ii. 530. 



Rhododendron hirsutum, and snow, i. 550. 



and summer cold, i. 545. 



gaUs of Exobasidium, ii. 520. 



honey protection, ii. 239. 



leaf, under side and sectiouj i. 232. 



nectaries, ii. 177. 



pollen-tetrads with viacin threads, ii.lOl^ 



protandrous, ii. 311. 



scroll-gall, ii. 530. 



weather and self- and cross-poUination, 



ii. 391. 



Rhododendron intermedium, autogamy, ii. 

 589. 



Rhododendron Lapponicum, cold resistance, 

 i. 543. 



Rhododendron Pouticum, and cold, i. 543. 



Rhododendrons, Alpine, PI. X. 



sheltered pollen, ii. 107. 



Rhodophycese, ii. 606, 620. 



Rhodoraceae, ii. 768. 



Rhodotypus, reserve-buds, ii. 33. 



Rhopalocnemis phalloides, geographical dis- 

 tribution, i. 193. 



Java, i. 191. 



Rhubarb. 8ee Itheum. 



Rhus Cotinus, anthocyauin 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. 476, 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. 



Ricciace», description, ii. 697. 



Rice, starch, i. 469. 



Richardia, monoecious, ii. 297. 



Richardia eethiopica, 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. 599. 



— staminal fllament, ii. 88. 



— venation, i. 632. 



Ricinus commimis, crystalloids, i. 457. 



distribution of sexes, ii. 300. 



pistillate flower, moncecia, ii. 293. 



Ricinus communis, seed and embryo, ii. 425. 



seed-dispersal, ii. 836. 



spiral vessels and bundle-sheath, i. 471. 



stamen, ii. 87. 



staminate flower, moncecia^ ii. 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. 



Riversi, self-purification, i. 265. 

 Rivina, pollen-grains, ii. 99. 

 Rivulari;a, ii. 622. 



Robinia Fseudacacia, flowering and foliage, 

 i. 562. 



leaf, diurnal positions, i. 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, 1. 83. 



— smooth steep, habitat for various micro- 



scopic plants and Lichens, i. 117. 

 Roemeria, autogamy, ii. 341. 



— stigma, ii. 279. 



Roemeria violacea, opening and closing, ii. 212. 



Rolling fruits, ii. 849. 



Root, 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-Iarvse, i. 



762. 



— shortening and downward pull, i. 770. 



— sorts of, i. 750 et seq. 



— supporting, i. 754. 

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

 Root-buds, i. 766. 



Root-cap, absence in certain plants, 1. 764. 



foimation, i. 579. 



function and structure, i. 763. 



Root-climbers and prostrate stems, i. 708. 

 Root-cortex, functions, i, 762. 

 Root-hairs, i. 87. 



fuugal hyphse as a substitute for, i. 249. 



length, i. 86. 



of aiirial 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-tendi'ils, 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. 



— chlorophyll in, i. 376, 766. 



— climbing, characteristics, i. 701. 



— dead, source of carbonic and nitric acids, 



i. 266. 



— forms of, i. 749 et seq. 



Roots, fimctions and differentiation, i. 761. 



— mechanical force, i. 616. 



— of Ficus, i. 765. 



form living bridges, iL 758, 760. 



— of Lathraea, 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. 

 Roridu^ 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, it 43. 

 Rosa, aggregate fruit, it. 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, iL 533, 



— opening of flower, ii. 211, 212. 



— phyUotaxis, 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, iL 213. 



scent, ii. 204. 



Rosa BanksisB, myrmecophilous, ii. 233. 

 Eosa caniua and galls of Rhodites Rosee, iL 

 553. 



cotyledons, i. 621. 



scent, ii. 204. 



Rosa centifolia, scent, ii. 204. 



Eosa cinnamomea, scent, ii. 204. 



Rosa Gallica, scent, ii. 204. 



Rosa pimpineUifoha, scent, ii. 204. 



Rosa rubrifolia, ii. 553. 



Rosa Schottiana, receptacle and carpels, ii. 74. 



Rosa Thea, scent, iL 204. 



Rosacese, ii. 779. 



— autogamy in, ii. 390, 



— dehiscence of poUen-sacs, ii. 92. 



— distribution of sexes, ii. 298. 



— geitouogamy in, ii. 325. 



— Phrygian, L 444. 



— protogyny in, ii. 310. 

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

 'RoaeotJencho.&eeAnastaticahierochuntica. 

 Eose-root. See Rkodiola rosea. 

 Eose-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, ii, 86. 

 Rosettes, of leaves, i. 410. 



Ross, Captain John, observes Red-snow in 



Arctic America, i. 38. 

 EosteUum, of Epipogium aphyllum, ii. 226. 



— of Orchids, ii, 253. 

 Eotang, barbs, i. 677. 



— climbing habit, i. 362. 



— mechanical tissue, i. 732. 



— shoot apices, i. 676. 

 Rotangs, in Java, L 675. 



— length, i. 676. 



Rotifer, in FruUania pitoher, ii. 698. 



