972 



INDEX. 



Rhizophora Mangle, branch with flowers 

 and fruit, ii. 451. 



Rhizophore, of Selaginella, ii. 715. 



Rhizopboreae, pollen-chambera, ii. 90. 



Rbizopoda, prey of Utricularia montaaa, i. 

 123. 



Rhizopus nigricans, spores and heat, i. 554. 



Rhizotomoi, ancient Grecian guild of herbal- 

 ists, i. 2. 



Rhodiola rosea, distribution of sexes, ii. 299. 



Rhodites eglanterise, pea-like gaU, ii. 552. 



Rhodites Roseb, 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 Ghamrecistus, 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 fl.ower 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. 



Rhododeudron hirsutum, and snow, i. 550. 



and summer cold, i. 545. 



galls of Eiobasidium, ii. 520. 



— — honey protection, ii. 239. 



leaf, under side and section, 1. 232. 



nectaries, ii. 177. 



pollen-tetrads with viscin threads,iil01. 



protandrous, ii. 311. 



scroU-gaU, ii. 530. 



weather and self- and cross-pollination, 



ii. 391. 



Rhododendron intermedium, autogamy, ii. 

 589. 



Rhododendron Lappouicum, cold resistance, 

 i. 543. 



Rhododendron Ponticnm, and cold, i. 543. 



Rhododendrons, Alpine, ii. 107. 



sheltered pollen, ii. 107.* 



Rhodophyceaj, ii. 606, 620. 



Rhodorace^e, ii. 768. 



Rhodotypus, reserve-buds, ii. 33. 



Rhopalocnemis phalloides, geographical dis- 

 tribution, i, 193. 



Java, i. 191. 



Rhubarb. See Rheum. 



Rhus Cotinus, anthocyanin in buda, i. 484. 



distribution of sexes, ii. 297. 



hairy flower-stalks, ii. 858. 



Khus semialata. Aphis galls, ii. 535. 



Rhus Toxicodendron, t. 488. 



Rhus Typhinuni, i. 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



E-ibbon-growths, plant community, ii. 888, 

 893. 



Ribbon-like stems of Liane, i. 475. 



Ribes alpiuum, distribution of sexes, ii. 299. 



pocket-galls on, ii. 532. 



Ribes aureum, scent, ii. 201. 



Ribes Grossularia, flower, ii. 236. 



Kibes rubrum, flower, ii. 173. 



Rtcciaceai, description, ii. 697. 



Rice, starch, i. 459. 



Richardia, moncecious, ii. 297. 



Richardia gethiopica, 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. 



Ricinus communis, crystalloids, i. 457. 



distribution of sexes, ii. 300. 



pistillate flower, monoecia, ii. 293. 



Ricinus communis, seed and embryo, ii. 426. 



seed-dispersal, ii. 835. 



spiral vessels and bundle-sheath, i. 471. 



stamen, ii. 87. 



staniinate flower, moncecia, ii. 293. 



stem, i. 656. 



Riella helicophylJa, 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. 

 Riviua, pollen-grains, ii. 99. 

 Rivularia, ii. 622. 



Robiuia 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. 



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-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^huds. 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 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, L 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-shorteniog, disperses bulbs, ii. 831. 



Root-stock. See Hhizome. 



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, 1. 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, L 761. 



— mechanical force, i. 515. 



— of Ficus, i. 755. 



form living bridges, ii. 758, 760. 



— of Lathrsea, 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- 

 Rorjdula, 1. 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 fmit, ii. 436. 



— and ancient crossing, ii. 555. 



— and galls of Rhodites Rosae, 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. 



— poUen-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 alpiua, scent, ii. 204. 



Rosa arvensis, duration of flowering, ii. 213. 



scent, ii. 204, 



Rosa Banksise, myrmecophilous, ii. 233. 

 Rosa canina and galls of Rhodites Rosae, ii 

 553. 



cotyledons, i. 621. 



scent, ii. 204. 



Rosa centifolia, scent, ii. 204, 



Rosa ctnnamomea, scent, ii. 204. 



Rosa GalUca, scent, ii. 204. 



Rosa pimpiueUifolia, scent, ii. 204. 



Rosa rubrif olia, ii. 553. 



Rosa Schottiana, receptacle andcarpels,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. SeeAnastaticahierochuntica. 

 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. 

 Rotangs, in Java, i. 676. 



— length, i. 676. 



Rotifer, in Frullania pitcher, ii, 698. 



