972 



INDEX. 



Rhizophora Mangle, branch with flowers 

 and fruit, ii. 451. 



Khizophore, of Selaginella, ii. 715. 



Rhizophorese, polleu-chambers, ii. 90. 



Ehizopoda, prey of Utricularia montana, i. 

 123. 



Rhizopus nigricans, spores and heat, 1. 554. 



Khizotomoi, ancient Grecian guild of herbal- 

 ists, i. 2. 



Rhodiola rosea, distribution of sexes, Ii. 299. 



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



Rhodites Rosae, and Eedeguars, 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 Chaniiecistus, cross-fertiliza- 

 tion, i. 301. 



insects and pollen, ii. 245. 



protogynous, ii. 311. 



visoin 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 Jixobasidium, ii. 520. 



honey protection, ii. 239. 



leaf, under side and section, i. 232. 



nectaries, ii. 177. 



poUen-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, 

 1. 543. 



Rhododendron Ponticum, and cold, 1. 543. 



Rhododendrons, Alpine, ii. 107. 



sheltered pollen, ii. 107.~ 



Rhodophyee*, ii. 606, 620. 



Rhodoraccifi, 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. 



Rh\is Toxicodendron, i. 488. 



Rhus Typhinum, i. 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



Ribbon-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. 



Bibes aureum, scent, ii. 201. 



Ribes Grossularia, flower, ii. 236. 



Ribes rubrum, flower, ii. 173. 



Eicciacese, description, ii. 697. 



Rice, starch, i. 459. 



Ricliardia, moncecious, ii. 297. 



Richardia ajthiopica, 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. 



— stamiual 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. 425 



seed-dispersal, ii. 835. 



spiral vessels and bundle-sheath, i. 471, 



stamen, ii. 87. 



staminate flower, monoecia, 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. 

 Riviua, pollen-grains, ii. 99. 

 Rivularia, ii. 622. 



Robin ia 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, epiphyUous buds, ii. 40. 

 flinty armour, i. 323. 



Rochelia persioa, hooked fruit, ii. 873. 

 Kock, 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. 



Rameria violacea, opening and closing, ii. 212. 



RoUing 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 puU, 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. 356. 



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, 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-Uke, 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, epiphyUous buds, ii. 43. 

 Rosa, aggregate frait, 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. 



— 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 alpiua, scent, ii. 204. 



Rosa arvensis, duration of flowering, ii. 213. 



scent, ii. 204. 



Rosa Banksiae, myrmecophilous, ii. 233. 

 Rosa canina and galls of Rhodites Rosae, a, 

 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, 11. 553. 



Rosa Schottia na, receptacle and carpels,ii.74. 



Rosa Thea, scent, ii. 204. 



Rosaces, 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. SeeAnastaticahieroehunCica. 

 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, 1. 677. 



— climbing habit, i. 362. 



— mechanical tissue, i. 732. 



— shoot apices, i. 676. 

 Rotangs, in Java, i. 675. 



— length, i. 676. 



Rotifer, in Frullania pitcher, ii. 698. 



