944 



Digitalis, and insect visits, ii. 222. 



- as insect shelter, ii. 163. 



- bees and pollen, ii. 247. 



corolla and autogamy, ii. 367. 



effect of mutilation, ii. 517. 



one-sided raceme, ii. 224. 



ovary, ii. 76. 



protandrous, ii. 311. 



protection of pollen, ii. 118. 



- spurred hybrids, ii. 576. 



Digitalis graudiflora, attraction of foreign 

 pollen-tubes by ovules, ii. 414. 



Digitalis lutescens, sheltering of pollen, n. 

 110. 



Digitalis ochroleuca, elevation and colora- 

 tion, ii. 511. 



Digitalis purpurea, duration of flowering, 11. 



flower-opening constant, L 559. [213. 

 temperature experimente, i. 502. 



Dill. See Anethum yraveolttu. 

 Dimorphic fruits, ii. 878. 

 Dinif era, group of Dinoflagellata, ii. 625. 

 Dinoflagellata, animal affinities, ii. 620. 



description, ii. 625. 



Dioecious flowers, and wind-fertilization, ii. 

 134. 



- plant, type, ii. 299. 



plants and hybridization, ii. 314. 

 majority protogynous, ii. 313. 



pollination, ii. 136. 



Dionsea, advantage of carnivorous habit 

 questioned, i. 157. 



- leaf compared to that of Drosera, i. 151. 



ovary, ii. 75. 



Dionsea muscipula, i. 148, 150, 340, 536. 

 Dioon, Central America, ii. 720. 

 Dioscorea, mechanical tissue, i. 732. 



pollen-grains, ii. 99. 



- seed-dispersal, ii. 852. 

 Dioscorides, i. 4. 



Diospyros Lotus, imperfect flowers, ii. 294. 

 Diphtheria, i. 163. 506; ii. 624. 

 Diplochlamydeae, of De Candolle, ii. 603. 

 Diplosis, escape of larvsa from galls, ii. 538. 

 Diplosis botularia, gall on Ash leaf, ii. 534. 

 Diplosis tremulae, gall on Aspen petiole, ii. 



540. 

 Diplotaxis, dehiscence of pollen-sacs, ii. 93. 



twisting of anther, ii. 250. 

 Dipsacese, ii. 352, 765. 



distribution of sexes, ii. 298. 



- insects and pollen, ii. 244. 



- pollen deposition in, ii. 278. 



water receptacles, i. 156. 



Dipsacus, protective water basins, ii. 234. 

 Dipsacus laciniatus, water- receptacles, i. 



239, 242. 



Diptera, gall formation, ii. 527. 

 Diptero-cecidia, gnat-galls, ii. 528. 

 Disa, S. Africa, ii. 737. 

 Disciflorse. ii. 777. 

 Discolichenes, characters, ii. 693. 



- subdivision, ii. 694. 

 Discomycetes, i. 168; ii. 19, 676, 682, 683. 



as lichen-fungi, ii. 693. 



- mode of attack, i. 163. 

 Discopodium, i. 746. 

 Disc-shaped receptacle, i. 746. 

 Disease, due to bacteria, L 163. 



Dishes, water-collecting, of plants, position 



i. 240. 

 Dispersal of offshoots, by animals, ii. 827. 



general remarks, ii. 832. 

 Displacement, of leaf, by torsion, i. 407. 



- of whorls, L 397. 

 Dissemination and germination, i. 614. 



of respective partners of Lichen-thallus 



i. 246. 

 Distribution and climate, ii. 879. 



- conditions affecting, ii. 2. 



- of plants, and heat, i. 527. 

 Divergence of leaves, i. 397, 403. 

 Diviflion, of cells, i. 576. 



- of labour, L 251, 367, 561, 594. 

 Doctrine of prolepsis, i. 8. 

 Dodder. See Cuscuta. 

 Dodecatheou. autogamy, ii. 333. 



INDEX. 



Dog's Mercury. See Mercurialis perennis. 

 )og'8-tooth Violet. See Erythronium Dens- 



Canis. 



._gwood. See Cornus saiujuinea. 

 )olomite, attacked by Lichens, i. 257. 



prevalence of, i. 83. 



)oria, pericarp mucilage, i. 615. 

 )ormant buds, ii. 30. 



eye, nature of, ii. 30, 34. 



)oronicum, artificially induced drooping, ii. 

 123. 



protection of pollen, ii. 120. 

 Doronicum cordatum, dichogamy, ii. 312. 

 )oronicum glaciale, geitonogamy, ii. 322. 

 )oronicum Pardalianches, opening of 



flowers and growth, ii. 220. 

 Doronicum scorpic-ides, geitonogamy, ii. 



322. 



Dorsal suture, of follicle, &c., ii. 430. 

 Dorsteniaceae, ii. 758. 



on trees and rocks, i. 156, 108. 



seed-dispersal, ii. 835. 

 Dorycnium decumbens, ash of, i. 69. 

 isolated colonies, i. 528. 



Dorycnium herbaceum, seed-dispersal, ii. 833. 

 Doryphora, stamens, ii. 87, 89. 



staminal stipules, ii. 89. 

 double flowers, i. 646. 



abortive pollen, ii. 403. 



due to gall-mites, ii. 548. 



long fresh, ii. 287. 



origin, ii. 86. 



Douglas Fir. See Tsuga Douglasii. 

 Doum Palm. See Hyphcene thebaica. 

 Draba, hybridization, ii. 584. 



indumenta of hybrids, ii. 564. 



nectary, ii. 175. 



Draba aizoides, autogamy, ii. 337. 



colour-contrast in inflorescence, ii. 192. 



protection of pollen, ii. 121. 



Draba alpina, absence of hairs, ii. 316. 



Draba borealis, autogamy, ii. 339. 



Draba Hoppeana, hybrid of D. Fladnizensis 



X D. Carinthiaca, ii. 586. 

 Draba repens, unfruitful artificial autogamy, 



ii. 406. 



Draba stellata, habitat and hairiness, i. 315. 

 Draba Thomasii, hairs, i. 321. 

 Draba tomentosa, habitat and hairiness, i 



315. 

 Draba verna, autogamy, ii. 339. 



colour-contrast in inflorescence, ii. 192. 



Dractena, mode of growth, i. 660. 



Dracaena Draco, geographical distribution, 



&c., ii. 731. 

 of Orotava, age and dimensions, i. 714 



720. 



Dracocephalum, pericarp mucilage, i. 615. 

 Dracocephalum Ruyschianum, elevation anc 



coloration, ii. 511. 

 Dracontium, tubers, ii. 745. 

 Dracunculus creticus, and carrion-flies anc 

 beetles, ii. 208. 



&c., insect visitors, ii. 165. 



Dragon-tree. See Dracaena Draco. 

 Draparnaldia, differentiation of thaflus, ii 



620. 



swarm-spores, i. 29, 30. 



- thallus, ii. 652. 



Drimys, pollen tetrads, ii. 97. 

 Dropwort. See Spircea Filipendula. 

 Drosera, i. 143, 154, 158, 237, 536. 



arrangement of leaves, &c., i. 144. 



autogamy, ii. 356. 



comparison of leaf with that of Dionsea 



i. 151. 



digestion of prey, i. 146. 



duration of blossoming, ii. 214. 



glands, i. 144. 



great number of species, i. 143, 148. 



nectaries, ii. 178. 



- ovary, ii. 75. 



ovule, ii. 82. 



pollen-sacs, ii. 89. 



- stigma, ii. 282. 



tentacles aud their movements, i. 145. 

 Drosera intermedia, antholysis, ii. 83. 



Drosera longifolia, duration of blossoming, 

 ii. 214. 



flower, ii. 279. 



opening and closing, ii. 212. 



stigma, ii. 279. 



weather and autogamy, ii. 391. 



Drosera obovata, hybrid of D. longifolia X 



D. rotundifolia, ii. 586. 

 Drosera rotundifolia, carnivorous, habitat. 



i. 143. 

 Droseraceae, genera of, i. 148. 



movements of stamens, ii. 250 

 Orosophyllum, i. 148. 



description, i. 154. 



epiphyllous secretory glands, i. 157. 



ovary, ii. 75. 



used as lime-twigs, i. 155. 

 Drosophyllum lusitanicum, i. 155 ; ii. 237. 

 Drupaceous nut, nature of, ii. 429. 



of Fumaria, ii. 427. 



Drupe, nature of, ii. 428. 



Dryadese, protection of pollen, ii. 118. 



Dryandra, inflorescence, ii. 230. 



pollination, ii. 230. 



Dryandra floribunda, protection of stornata 



from moisture, i. 296, 298. 

 Dryas, receptacle and carpels, ii. 76. 

 Dryas octopetala, i. 303, 304. 



autogamy in, ii. 381. 



distribution of sexes, ii. 298 



procumbent habit, i. 662. 



Dryness, preventive of decay, i. 262. 



seed protection against, ii. 447. 

 Dryobalanops, seed-dispersal, ii. 854. 

 Dryoterus terminalis, bud-galls on Oak, ii. 



543. 



Dry-rot, i. 508. 



Dry-rot Fungus. See Merulius lacrymans. 

 Du Bois Raymond, compares dynamical 



with morphological description, i. 17. 

 Duckweed. See Lemna. 

 Ducts, for collecting water, in foliage-leaves, 



i. 231. 

 Dudresnaya coccinea, antheridia, &c., ii. 61. 



fertilization and fruit formation, ii. 53. 



Dulcite, alluring, i. 461. 



Dung-beetles, and colour and odour of 



flowers, ii. 197. 



Durmast. See Quercus sessiliflora. 

 Durvillsea, habit, ii. 664. 

 Durvillsea utilis, edible, ii. 665. 

 Dust, aerial, chemical substances in, i. 81. 



circulation of, i. 81. 



collection by Mosses and Lichens, &c., i. 



266. 



in snow and air, i. 79. 



meteoric, nature of, i. 80. 



organic, food of rotifers, ii. 255. 

 Dutch Rush. See Equisetum hiemale. 

 Duvaua longifolia, and gall of Cecidoses 



Eremite, ii. 534, 537, 539. 

 Dwarf Elder. See Sambueus Ebulus. 



Leek. See Allium Chamcemoly. 



male, of OEdogonium, ii. 651. 



Palm. See Chamcerops humilis. 



E. 



Earth, properties and structure, i. 82-84. 



Earth-stars. See Geaster. 



Earwigs, protection against, ii. 445. 



East Indian Archipelago. Heuslowia in, i. 204. 



Ebenaceae, ii. 768. 



Ecballium Elaterium, seed-dispersal, ii. 834. 



Echeveria, epiphyllous buds, ii. 40. 



leaf-rosettes, i. 410. 

 Echeverias, and cold, i. 543. 



Mexican, aqueous tissue, i. 328. 

 Echinocactus, i. 327. 



and night visitors, ii. 196. 



cross-fertilization, ii. 301. 



spines, i. 446. 



Echinocactus horizon talis, ii. 787. 

 Echinocactus oxygonus, &c., size of flowera, 



ii. 186. 



