972 



INDEX. 



Rhizophora Mangle, branch with flowers 

 and fruit, ii. 451. 



Biiizophore, of Selaginella, ii. 715. 



Rhizophoreie, poUen-chambers, ii. 90. 



Rhizopoda, prey of Utricularia moutana, 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 eglanterije, pea-like gall, ii. 552. 



Rhodites Rosje, and Bedeguars, ii. 552. 



— — gall on Rose-leaf, ii. 533. 

 Rhodites spinosissima, gall, ii. 552. 

 Rhododendron, and animals, 1. 432. 



— pollen tetrads, ii. 97. 



— protection of pollen, ii. 118. 



— sticky stigmas, ii. 282. 

 Rhododendron Chamsecistus, cross-fertiliza- 

 tion, i. 301. 



insects and pollen, iL 245. 



protogynous, ii. 311. 



viscin of poUen-graius, 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 gaD-mites, ii. 550. 



nectaries, iL 177. 



scroll-gall, ii. 530. 



Rhododendron hirsutum, and snow, L 550. 



and summer cold, i. 545. 



galls of Eiobasidium, ii. 520. 



honey protection, ii. 239. 



leaf, linder side and section, i. 232. 



nectaries, ii. 177. 



pollen-tetrads with viscin threads, ii.l01. 



protandrous, ii. 311. 



scroU-gall, ii. 530. 



weather and self- and cross-poUination, 



11391. 



Rhododendron intermedium, autogamy, ii. 

 5S9. 



Rhododendron Lapponicum, cold resistance, 

 L543. 



Rhododendron Fouticum, and cold, i. 543. 



Rhododendrons, Alpine, PI. X. 



sheltered pollen, ii. 107. 



Rhodophycea, ii. 606, 620. 



Rhodoracese, ii. 76S. 



Rhodotypus, reserve-buds, ii. 33. 



Rhopalocuemis phalluides, geographical dis- 

 tribution, i. 193. 



Java, i. 191. 



Rhubarb. See Rheum. 



Rhus Cotinns, anthocyanin in buds, L 484. 



distribution of seses, ii. 297. 



hairy flower-stalks, ii. 858. ''- 



Rhus semialata, Aphis galls, ii. 535. 



Rhus Toxicodendron. PL V. L 488. 



Rhus Typhinum, PI. V. L 488. 



Rhynchosia phaseoloides, stems, i. 475, 477. 



Ribbon -growths, plant community, iL 868, 

 893. 



Ribbon-like stems of Liane, L 475. 



Ribes alpinum, distribution of sexes, iL 299. 



pocket'galls on, ii. 532. 



Ribes aureum, scent, iL 201. 



Ribes Grossularia. flower, iL 236. 



Ribes rubruiu, flower. U. 173. 



Ricciaces, description, iL 697. 



Rice, starch, L 459. 



Ricbardia, monuecious, ii. 297. y^i 



Richardia ^thiopica, coloured bract, ii. 184. 



Richmond, Virginia, U.S.A., Diatom de- 

 posit, ii. 627. 



Kicinus, cotyledons in germination, L 610. \ 



— protection of pollen, ii. 124. 



— protogynous, ii. 313. 



— seed, section, i. 599. 



— staminal filament, iL 88. v 



— venation, L 632. 



Kicinus communis, cr>-stalloid8, i. 457. v 



— ^ distribution of sexes, iL 300. 

 pistillate flower, mouuccia. ii. 293. 



Ricinus communis, seed and embryo, iL 425. 



seed-dispersal, ii. 835. 



spiral vessels and bundle-sheath, i. 471. 



stamen, iL 87. 



staminate flower, nionoecia, ii. 293. 



stem, i. 656. 



Riella helicophylla, ii. 611. 

 Ring, annual, L 719. 

 Ringed bark, i. 720. 

 Ringed tendrils, i. 694. 

 Ringing, effect of, L 480. 



— experiment, and ascent of sap, L 276. 

 "Ripened" wood, i. 552. 



Rivers, self -purification, i. 265. 

 Rivina, pollen-grains, ii. 99. 

 Rivularia, ii. 622. 



Robinia Fseudacacia, fiowering and foUage, 

 L 562. 



leaf, diurnal positions, i. 534. 



reserve-buds. ii. 31. 



scent, ii. 200. 



spines, L 449. 



Rocbea, functions of hairs, i. 325. 



— water-storing epidermis. L 329. 

 Rocbea falcata. epiphyllous buds, ii. 40. 

 thnty armour, i. 323. 



Rochelia persica, hooked fruit, ii. 873. 

 Rock, substitute for tree-trunks, i. 108. 

 Rocks, decomposition of constituents, L 83. 



— smooth steep, habitat for various micro- 



scopic plants and Lichens, L 117. 

 Roemeria, autogamy, ii. 341. 



— stigma, ii. 279. 



Rtemeria 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. L 579. 



— origin, L 766. 



— protection from mice and insect-larrse. L 



762. 



— shortening and downward pull. i. 770. 



— sorts of. i. 750 el seq. 



— supporting, i. 751 

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

 Root-buds, L 766. 



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



formation, i. 579. 



function and structure, L 763. 



Root-climbers and prostrate stems, L 708. 

 Root-cort«x, functions, i. 762. 

 Root-hairs, i. 87. 



fuugal hyphie as a substitute for. L 249. 



length, i. 86. 



of aerial roots of Tree-ferns, i. 224. 



on what development depends, i. 89. 



position and renewaL L 90. 



retention of earth particles, L 87. 



thickness of inner coat, i. 88. 



Root-pressure, and transpiration, L 281, 366. 

 elevation and extrusion of sap through, 



L271. 

 force of, experimental determination, 



L272. 



in Aroid roots, i. 366. 



limitation of, L 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, L 694. 



Roots, acid juice of, corrosive power, L 258. 



— aerial, of Aroids, L 366. 



of Orchid, i. 221. 



adhering to bark. L 107. 



— and oxygen, i. 493. 



— aquatic, structure and function, L 763. 



— artificial propagation from, iL 27. 



— behaviour in Arctic regions, L 774. 



— chlorophyll in, L 376, 766. 



— climbing, characteristics, i. 701. 



— dead, source of carbonic and nitric acids, 



i. 266. 



— forms of, i. 749 et seq. 



Roots, ftmctions and differentiation, L 761. 



— mechanical force, L 515. 



— of Ficus, i. 755. 



form living bridges, iL 758, 760. 



— of Lathnea, i. 1S2. 



— of Pedicularis, behaviour, L ISO. 



— of Phanerogams, mechanical changes due 



to, L 265. 



— poisonous secretions, i. 763. 



— positive geotropism of, L 88. 



— primary, origin, i. 771. 



— shape, determining factors, L 757. 



— stilt-like, of Mangroves, i. 759. 



— strap-shaped, L 107- 

 Roridula, L 148. 



Roridula dentata, carnivorous in minor de- 

 gree. L 156. 

 Roridula muscipiila, source of name, iL 235. 

 Roripa, hybridization, ii. 584, 

 Roripa amphibia, aerial and submerged 

 leaves, ii. 505. 



ami R. sjivestris, hybrid of. ii. 586. 



Roripa palustris, epiphyllous buds. ii. 43. 

 Rosa, aggregate fruit, 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, iL 571. 



— hips, protection against rodents, iL 444. 



— indumenta of hybrids, ii. 564. 



— innumerable hybrids, ii. 585. 



— leaf with various galls, ii. 533. 



— opening of flower, ii. 211, 212, 



— phyllolaxis, L 400. 



— pollen-grains, ii. 99. 



— prickJes, 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 floweriDg, ii. 213. 



scent, ii. 204. 



Rosa Banksise, myrmecophilous, ii. 233. 

 Rosa canina and gaUs of Rhodites Kosse, iL 

 553. 



cotyledons, i. 621. 



scent-, ii. 204. 



Rosa centifolia. scents ii. 2M. 



Rosa cinnamomea, scent. iL 204. 



Rosa GaUica, scent, ii. 204, 



Rosa ptmpiuellifolia, scent, ii. 204. 



Rosa rubrif olia, IL 553. 



Rosa Schottiana, receptacle andcarpels,iL 74. 



Rosa Thea, scent, iL 204. 



Rosaceee, ii. 779. 



— autogamy in, ii. 390. 



— dehiscence of pollen-sacs, ii. 92. 



— distribution of sexes, ii. 298, 



— geitonogamy in, iL 325. 



— Phrj-gian, L 444. 



— protogyny in, ii. 310. 

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

 Roseof Jericho. See-4Ha.st<iricdAi>ro:Aun/i«i. 

 Rose-root. See Rhodwla rosea. 

 Rose-trees, winter treatment, L 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, IL 86. 

 Rosettes, of leaves, i. 410. 



Ross, Captain John, observes Rcd-snov ia 



Arctic America, i. 38. 

 Rostellum, of £pipogium aphyllum, ii 226. 



— of Orchids, ii. 253. 

 Rotang, barbs, i. 677. 



— climbing habit, i. 362. 



— mechanical tissue, i. 732. 



— shoot spices, i. 676. 

 Rotangs, in Java. L 675. 



— length, i. 676. 



Rotifer, in Frullania pitcher, iL 698. 



