972 



INDEX. 



Ehizophora Mangle, branch with flowers 

 and fruit, ii. 451. 



Rhizophore, of Selaginella, ii. 715. 



Rhizophorese, polleii-chanibers, ii. 90. 



Rhizopoda, prey of Utricularia montana, i. 

 123. 



Rhizopus nigricans, spores and heat, i. 554. 



Rhizotoinoi, ancient Grecian guild of herbal- 

 ists, i. 2. 



Rhodiola rosea, distribution of sexes, ii. 299. 



Rhodites eglauteriae, pea-like gall, ii. 552. 



Rhodites Rosae, 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 Chamaecistus, cross-fertiliza- 

 tion, i. 301. 



insects and pollen, ii. 245. 



protogynous, ii. 311. 



viscin of pollen-grains, ii. 101. 

 Rhododendron ferrugineum and R. hirsu- 



tum, hybrid of, ii. 564. 



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, ii. 530. 



Rhododendron hirsutum, and snow, i. 550. 



and summer cold, i. 545. 



galls of -Lxobasidium, ii. 520. 



honey protection, ii. 239. 



leaf, under side and section, i. 232. 



nectaries, ii. 177. 



pollen-tetrads with viscin threads, ii.101. 



protandrous, ii. 311. 



scroll gall, ii. 530. 



weather and self- and cross-pollination, 



ii. 391. 



Rhododendron intermedium, autogamy, ii. 

 589. 



Rhododendron Lapponicum, cold resistance, 

 i.543. 



Rhododendron Pouticum, and cold, i. 543. 



Rhododendrons, Alpine, ii. 107. 



sheltered pollen, ii. 107." 



Rhodophyceae, ii. 606, 620. 



Rhodoracese, ii. 768. 



Rhodotypus, reserve-buds, ii. 33. 



Rhopalocnemis phalloides, geographical dis- 

 tribution, i. 193. 



Java, i. 191. 



Rhubarb. See Rheum. 



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, i. 488. 



Rhus Typhinum, i. 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



Ribbon-growths, plant community, ii. 888, 



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. 

 Ricciaceaj, description, ii. 697 

 Rice, 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. 599. 



staminal filament, ii. 88. 



venation, i. 632. 



Riciuus communis, crystalloids, i. 457. 

 distribution of sexes, ii. 300. 



pistillate flower, monoacia, 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, monrecia, 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. 



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. 



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. 

 Roemeria, autogamy, ii. 341. 



stigma, ii. 279. 



Rcemeria 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-larvae, 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, 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. 



fungal hyphse 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, 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, functions and differentiation, i. 76L 



mechanical force, i. 515. 



of Ficus, i. 755. 



form Ii ving bridges, ii. 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 deutata, carnivorous in minor de- 

 gree, i. 156. 

 Roridula muscipula, source of name, ii. 235. 

 Roripa, hybridization, ii. 584. 

 Roripa amphibia, aerial and submerge( 

 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 Rosas, 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 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 Banksiae, 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 pimpiueUifolia, 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. 

 Rose of Jericho. SeeAnastatica hierochuntica. 

 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, 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. 

 lotangs, in Java, i. 675. 



length, i. 676. 



Rotifer, in Frullania pitcher, ii. 698. 



