INDEX. 



975 



Seeds, cold resistance, i. 544. 



— defensive orraDgements, ü. 443. 



— dimensions of. ii. 839. 



— dispersal by birds, ii. 444. 



— genuinating, i. 607. 

 force of, i, 510. 



temperatures, i. 557; ii. 4S8. 



— heat rtsistauce, i. 555. 



— lightness of, ii. 851. 



— number produced, ii. 878. 



— of Conifeno, ii. 442. 443. 

 dispersal, ii. 439. 



— of Oi-chitis. structure, &C., i. 377. 



— of parasites, germination, i. 171. 



— propagation of hybiids by, ii. 556. 



— protection against wet, ii. 448. 



— resting of. i. 563. 



— rugged, fixation, i. 616. 



— size and weight, ii. 451. 



— vitality of, i. 51. 



— with reserve-tissue, ii. 422. 

 Selaginella, characteiistics, ii. 477. 



— chlorophyll-granules, i. 373, 



— general structure, ii. 715. 



— sexual reproductive organs, ii. 69. 

 Selaginella Helvetica, inequality of leaves, 



i. 422. 



leaf-mosaic, i. 421. 



Selagiuella selagiuoides, British, ii. 715. 

 SeloginellacesB, description, ii. 715. 

 Selection, natural, theory of, ü. 600, 

 Self-fertilization and dichogamy, ii. 314. 



of flowers, ii. 291. 



Self-pollination, occurrence, ii. 331. 

 Semi-shrubs, spines of, i. 444. 

 Sempervivum, and animals, i. 432. 



— leaf-rosettes, i, 410. 



— stolons, i. 663. 



Sempervivum hirtum, attacked by Eudo- 

 phyllum Sempervivi, ii. 523. 



Sempervivum montanum, autogamy, ii. 344. 



cold resistance, i. 543. 



prey capturing, i. 155. 



sticky foliage, ii. 236. 



Sempervivum soboliferum, vegetative propa- 

 gation, ii. 821. 



Sempervivum tectonmi, stomata, i. 280. 



Sempervivum Wulfenii, cold resistance, i. 543. 



Senecio erucsefolius, cotyledons, i. 621. 



Senecio nemorensis and S. nebrodensis, 

 anthocyanin, i. 520. 



Senecio viscosus, florets and autogamy, ii- 363- 



Senecio vulgaris, effect of dry soil, ii. 500. 



light and growth, ii. 508. 



pericarp mucilage, i. 615. 



seed -dispersal, ii. 857. 



Sensation, in plants, i. 63. 



Sensitive plants, i. 535. 



— and nocturnal radiation, L 530. 



— change of colour and function, i. 376. 

 Separation-layer, formation, i. 359. 



"Sequoia gigantea, ii. 725. 



dimensions, i. 722. 



Serjania, extra- axillary buds, ii. 28. 



Serjania gramatophora, branch -tendrils, i. 

 693. 694. 



Serratula lycopifolia, proteotion by Ants from 

 Beetle, ii. 242. 



Seslcria, leaf-folding, i. 340. 



Sesleria coerulea, ring formation, ii. 792. 



Sesleria tenuifoUa, leaf, section, i. 341. 



Setaria Italica. pollination, ii. 142. 



Setaria verticillata, hooked fruit, ii. 871. 



Sexual and asexual generations, mutual re- 

 lations, ii. 474. 



Sexual System of classification, iL 601. 



Seychelles Palm. See Lodotcta Secfuilarum. 



Shade, effect on growth of plant«, ii. 506. 



Shepherd's Purse. See Capstlla Bur$a- 

 paxtoris. 



Shoot, acropetal development, i. 396. 



— morphological value, i. 333. 

 Shoot^apices of Rotaugs. i. 676. 

 Shoots, asexual, dissimilarity, ii. 471. 



— epiphyllous, ü 37. 



— reserve, leaf characteristics, ii. 516. 



— Bpinose, i. 443. 



Shoots, umlergrouml, important fimction. i. 



653. 

 Shore Pine. See Pin\^ Halepefi^is. 

 Shniba, foliage -leaves and rain, i. 93. 

 Sibbaldia, deliiscence of pollen-sacs, ii. 92. 



— honey, ii. 173. 



Sibbaldia procumbcns, habit, i. G62. 



stamen, ii. 91. 



Siberian Crab. See Pijnts salici/oJia. 

 Siiieritis Uomana, colour-contrast in flower, 



ii. 191. 

 Sidcritis scordioidus, pollen-grains, ii. 99. 

 Sieve-plates, i. 469. 

 Sieve-tube, i. 469. 



of Macrocystis, ii. 663. 



of Kereocystis, ii. 663. 



Sigillariacea;. characteiistics, ii. 716. 



Signatures, doctrine of, i. 2. 



Sileiie and Lychnis, pollen-grains, ii. 99. 



— pollination experiments, ii. 404. 



Silene acaulis. distribution of sexes, ii. 300. 



vertical range, ii. 750. 



Silcno conica, autogamy, ii. 336. 

 Silene Elizabethse. ai]d humble-bees, ii. 239. 

 Silene longiflora, and night visitors, ii. 196. 

 Silene noctitiora, behaviour to own and 

 foreign pollen, ii. 407. 



opening of flower, ii. 212, 



weather and autogamy, ii. 391. 



Silene nutans, and night visitors, ii. 196. 



capsules in dry and wet weather, ii. 448. 



closed flowers, ii. 154. 



distribution of sexes, ii. 300. 



doiible protection of honey, ii. 242. 



open flowers, ii. 155. 



pollination, ii. 154. 



scent, ii. 201. 



seed protection and dispersal, ii. 447. 



Silene Saxifra^a, and night visitors, ii. 196. 



cross-fertilization, ii. 307, 



opening of flower, ii. 212, 



Silene Vallesia. opening of flower, ii, 212. 

 Silt-ne vespertina, opening of flower, ii. 212. 

 Silene viscosa, carnivorous in minor degree, 



i. 156. 

 Siler, geitonogamy, ii. 324. 

 Silica, in cell-wall of Diatoms, ii. 625, 



— in Equisetimi, ii. 712. 



— in hairs of Rochea. i. 325. 



Siliceous marl, composed of Diatoms, ii. 627. 



Silicic acid, in Diatom frustules though no 



trace in aqueous habitat, i 70. 



accumulation through plants, i. 261. 



occurrence in plants, i. 67. 



Sil icifi cation, and animals, i. 433. 



— and preservation of fossil plants, ii. 612. 



— of hairs, i. 441. 



Silicon, in ash of plant, i. 66. 



Siliqua, morphology, ii. 432. 



Silk-worms, attacked by a Cordyceps, i. 168. 



Silky hairs, i. 320. 



Silphium laciniatum, a "compass plant", i. 



337. 

 SUphium perfoliatum, mechanical tissue 

 arrangement, i. 731. 



— — water-receptacles, i. 239 ; ii. 234, 

 Silver Fir. See Abiea pfctinata. 



Silver Tree. See Lcucadendron argenteum. 



Silyhura Marianum, method of water-con- 

 duction, i. 98. 



Sinapis, pollen-grain, ii. 100. 



Sinapis arvensis, autogamy, il. 348. 



duration of flowering, ii. 213. 



Sinkers, of Mistletoe, i. 209. 



Siphonaceo), fertilization and fruit-forma- 

 tion, ii. 53. 



Siphones. description, ii. 641, 



— differentiation of thallus. ii. 620. 

 Sisymbrium Tlmlianum, protection of pollen, 



ii. 121. 

 Sisyrinchium, nectary, ii. 176. 

 Sisyrinchium anceps, colour-contrast in 

 flower, ii. 190. 



weather and autogamy, ii. 391. 



Skatol, nature of, ii. 199. 

 SkinKliseases, due to Fungi, i. 168. 

 Skull-cap. See Scutellaria. 



Slat<>-rockfl, humus on, ii. 499. 



Sleep, of plants, i. 634. 



Sliniefungi. See Myxomycetes. 



Sling-fniit«. ii, 833. 



Slips, inipoaaibility of propagating certain 



plants by, i. 250. 

 Sloe. See Pruntut spinoaa. 

 Slugs, protection against, ii. 238. 

 Smell, sense of, ii. 204. 



and poisonous plants, i. 432. 



Smilacineie, jihylloclades, i. 649. 



— pollen-grains, ii, 09. 

 Smilacoidea), characteristic, ii. 732. 

 Smilax aspera, slipular tendrils, i. 690. 

 Smithia sensitiva, and rain, i. 537. 

 Smymium, coloured bracts, ii. 183. 



Snails, as lime-accumulators in top layers of 

 soil, i. 259. 



— elevation and coloration, ii. 511. 



— protection against, ii, 237. 

 Snake-root. See Calla paluMris. 

 Snow, as preservative agency, i. 262. 



— dust-collector, i. 80. 



— effect on foliage, i. 358. 



— melting by developing flower-buda, i. 498. 



— protection of plants, i. 548. 

 Snowdrop. See Oalanthua nivalis. 

 Snow-fall and elevation, i. 523. 

 Snow pressure and growth, i. 523. 

 Sodium, in ash of plants, i. 66. 



— in marine plants, i. 68. 



— phosphate, as food-salt, i. 67. 



— salts of, accumulation through plants, L 



261. 

 Soil and specific differences, experiments, ii. 

 496. 



— changes, in, due to nutrition of plants, 



i. 257 et seq. 



— clay, conditions of growth on, ii. 500. 



— effect on flowering, i. 9. 



— factors determining nutrition, i. 102. 



— on trees, i. 106. 



— retention of water, ii. 499. 



— sandy, conditions of growth on, ii. 500. 



— temperature in Alps, i. 525. 

 Solanacepe, ii. 771. 



— EBstivation in, ii. 210. 



— autogamy in, ii. 366, 



— diversity of pollen protection, ii. 128. 



— eitra^axillary buds, ii. 28. 



— nectary concealment, ii. 181. 

 Solanum DiUcamara, berry, ii. 427. 



colour-contrast of flowers, ii. 189. 



twining, i. 689, 



Solanum Lycopersicum, anther, ii. 90. 



movements of cotyledons, i. 532. 



stamen, ii. 91. 



Solanum sisymbrifoliurc, fndt protection, 



ii. 445. 

 Solanum sodomseum, fruit protection, ii. 445. 

 Solanum tuberosum, autogamy, ii. 371. 



— — colour-contrast of flower, ii. 189. 



crystalloids and starch grains, i. 457. 



diminished fruit formation, ii. 459, 



protection of pollen, ii. 120, 128. 



tuber, i. 651. 



young fruit, ii. 73. 



Soldanella, autogamy, ii. 333. 



— honey concealment, ii. 180. 



— hybrids, ii. 585. 



— melting of snow by, i. 498. 



— pollen-sprinkling apparatus, ii. 275. 



— protection of pollen, ii. 118. 



— sub-glacial blossoming, i. 499. 

 Soldanella alpina, flower, ii. 180, 275. 



corolla and autogamy, ii, 368. 



pollen-sprinkling apparatus, ii. 275- 



stamen, ii. 87. 



Soldanella montana, anthocyanin, t. 520. 

 Solfatara, Najiles, and Alga;, i. 554. 

 Sonchns arvonsis, latitude and closing, ii. 

 218. 



protection of pollen, ii. 127. 



Sonehus servicomus, spinosity. i. 444 

 Sophora olopecuroides, leaf, diurnal posi- 

 tions, i. 534. 

 Sorbus, deciduous protective hairs, i. 354. 



