Dasycladeae, characteristics, ii. 647. 

 Dasylirion, habitat, i, 438. 



— leaf, teeth aad apex, 1. 438. 

 Dasytes, honey-suoker, il. 179. 



— pollen devourer. ii, 167. 



Date Palm. See Phcmix dactylifera. 

 Date-plum. See Diospyros Lotus. 

 Datura, opening and closing, ii. 116. 



— scent, i. 202. 



Datura ceratocaula, size of flowers, ii. 185. 

 Datura Knightii, size of flowers, ii. 186. 

 Datura Metel, time open, ii. 213. 

 Datura Stramonium, fruit protection, 11. 442. 



inequality of leaves and use, i. 422. 



leaf-mosaic, i. 411. 



night visitors, ii. 196. 



odour, i. 431. 



opening of flower, ii. 212, 213. 



protection of pollen, ii. 113. 



Daucus, peripheral flowers, ii. 186. 



— umbel, day and night positions, i. 631. 

 Daucus Carota, downward pull of roots, i. 767. 

 protection of stomata from moisture, 



i. 295. 



root, i. 760. 



Daughter-cells, i. 578. 



Davallia, protection of sporangia, ii. 13. 



— sonis and indusium, ii. 706. 

 Day-lily. See Semerocallis Jlava. 



Deadly Nightshade. See Atropa Belladonna. 

 Dead Sea, blueness, i. 389. 

 De Caudolle, i. 15. 



table of classification, ii. 603. 



Decay, putrefactive, a necessary condition 



of life, i. 264. 

 Deciduous Cypress. See Taxodium dis- 



tichum . 

 Deciduous leaves, i. 347. 

 change of colour, i. 485. 



— shrubs, anthocyanin, i. 520. 



— stipules, i. 351. 

 Decurrent, leaf, i. 596. 



— leaves, transpiration, i. 336. 

 Decussate leaves, i. 398. 



Definitive nucleus, and endosperm forma- 

 tion, ii. 421. 



Defoliation, i. 361. 



Dehiscence of anthers in Grasses, ii. 91, 140. 



Deliiscent dry fruit, ii. 429. 



Deilaphila Euphorbise, victim of Araujia, ii. 

 260. 



De Juasieu, A. L. and B., natural system of 

 classification, ii. 602. 



De I'Ecluse. Charles (1526-1609). SeeClusius. 



Delphinium, foliage and light, i. 412. 



— follicle, ii. 430. 



— integument of ovule, ii. 81. 



— morphological value of ovule, ii. 82. 



— possible cause of doubling, ii. 554. 



— preservation of colour in Egyptian graves, 



L 262. 

 Delphinium Ajacis, effect of mutilation, ii. 



517. 

 Delphinium cashmirianum, antholysis, ii. 



78. 

 Delphinium elatum, antholysis, ii. 83. 



re-erection of inflorescence, i. 744. 



Delphinium nudicauleandD. cashmirianum, 



colour of flowers and hybrid, ii. 567. 

 Delpino, and difference of pollen in hetero- 



styled flowers, ii. 405. 

 Dendrobium, ii. 738. 



— fimbriatura, discharge of pollinia, ii. 269, 



270. 

 Denizen, application of term, i. 243. 

 Dentaria, peripheral flowers, ii. 186. 



— scaly stem, i. 652. 



— waxy coating, ii. 237. 



Dentaria bulbifera, bulbils, ii. 460, 461. 



habitat, ii, 110. 



rhizome and light, i. 484. 



Dentaria digitata, &c., leaf and light, i. 286. 



habitat, ii. 110. 



Dentaria enneaphyllos, habitat, ii. 110. 

 Dentate, i. 233. 



De Plantis libri, by Cesalpino, ii. 601. 

 Deposition of pollen, ii. 280. 



INDEX. 



Derbesia, zoosporangia and zoospores, ii. 



645. 

 Derivatives, of hydro-carbons, i. 454. 

 Dermatogen, and leaf origin, i. 649. 

 Dermestes, and Dracunculus vulgaris, ii. 



165. 



— and indoloid scents, ii. 207. 

 Dermestes undulatus, and Dracunculus 



Creticus, ii. 165. 

 Dermogloea, ii. 621. 

 De Saussure, discovers red-snow, i. 38. 

 Deserts, annual and perennial plants in, i, 



556. 

 Desiccation, protection from, by salt incrustar 



tions, i. 236. 



— protection of fruits from, ii. 449. 

 Desmanthus natans, swimming apparatus, 



i. 669. 



Desmid, division, ii. 655. 



Desmids and specific constitution of proto- 

 plasm, ii. 492. 



— cell-division, i. 139, 576, 581. 



— conjugation, ii. 55. 



— habitat, i. 76 ; ii. 655. 



— nutritive cycle, i. 139, 466. 



— sculpturing of wall, i. 577. 



— strias of cell-walls, i. 568. 



— swarms of, i. 585. 



— various species, i. 492. 



— zygospores, ii. 492. 



Desmodiumpenduliflorum, leaf, diurnal posi- 

 tions, i. 534. 



Desmoncus, spathe, i. 641. 

 Desmoncus polyanthus, shoot apex, i. 676. 

 Deterrent substances, i. 461. 

 Development, highest, views concerning, ii. 

 598. 



— of individual, and phyllogeny, ii. 608. 

 Dew, accumulation on under surface of 



leaves, i. 291. 



— and diurnal positions of leaves, i. 535. 



— carbonic and nitric acid in, i. 370. 



— on steppes and deserts, i. 235. 

 Dew-cup. See Alchemilla. 

 Dew-leaf. See Drosophyllum. 

 Dextrin, from starch, i. 465. 



— from sugar, i. 506. 



— osmotic behaviour of, 1. 59. 



— percentage composition, i. 454. 

 Diacalpe, protection of sporangia, ii. 13. 

 Diadromous venation, i. 633. 

 Dialypetala, of Endlicher, ii. 604. 

 Diandric, andxcecium, ii. 736. 

 Diandria, Linnean class, ii. 86. 

 Dianthoecia albimacula, pollinating Sllene 



nutans, ii. 155. 

 Dianthus, sestivation, ii. 210. 



— and ancient crossing, ii. 555. 



— and Campanula, colour-contrast, ii. 193. 



— double-flowered hybrids, ii. 676. 



— double flowers, ii. 80. 



— favoured guests, ii. 230. 



— honey protection, ii. 238. 



— hybridization and flower colours, ii, 568. 



— hybrids, ii. 584. 



autogamous propagation, ii. 579. 



— massing of flowers, ii. 186. 



— nectaries, ii. 176. 



— of Mediterranean, waxy bloom of leaves, 



i. 312. 



— pollen-grains, ii. 99, 102. 



— propagation by cuttings, i. 251. 



— substratum, ii. 498. 



— transition from stamens to petals, ii. 86. 

 Dianthus alpinus and D. superbus, hybrid 



of, ii. 563. 



cultural experiments, ii. 513. 



Dianthus Carthusianorum, pollen-grains, ii. 



98. 



thermal constants, i. 559. 



Dianthus Caryophyllus, mechanical tissue 



arrangement, i. 730. 



possible cause of doubling, ii. 554. 



scent, ii. 200. 



Dianthus deltoides, cultural experiments, 



sources of error, ii. 513. 

 Dianthus glaciahs, estivation, ii. 210. ; 



943 



Dianthus glaciaUs, autogamy, ii. 337. 364. 



distribution of sexes, ii. 298. 



Dianthus inodorus (sylvestris), elevation and 



coloration, ii. 511. 

 Dianthus neglectus, sestivation, ii. 210. 



autogamy, ii. 364. 



Dianthus CEnipontanus, hybrid, ii. 563. 

 Dianthus plumarius, possible cause of doub- 

 ling, ii. 554. 



scent, ii. 200. 



Dianthus prolifer, distribution of sexes, 

 ii. 298. 



duration of flowering, Ii. 213. 



Dianthus superbus, scent, ii. 200. 



Dianthus viscidus, source of specific name, 



ii. 235. 

 Diapensia Lapponica, Arctic, absence of 



hairs, i. 316. 

 Diapensiacese, ii. 768. 

 Diastase, action on starch, i. 459, 465. 



— distribution in plant, i. 483. 

 Diastole. See Vactiole. 



Diastrophus Scabioss, bud-galls on Cen- 



taurea, ii. 543. 

 Diatom, description, i. 261 ; ii. 625. 

 Diatom-deposits, ii. 627. 

 Diatom-earth, ii. 614. 

 Diatomacese, as prey of Aldrovandia, i. 153. 



— cell-membrane of, i. 40. 



— conjugation, ii. 55. 



— epiphytic, non-parasitic, i. 77, 160. 



— geographical distribution, ii. 626. 



— movements of, i. 39 ; ii. 626. 



— preparation of siliceous skeletons, i. 67 



— propagation, &c., ii. 626. 



— resistance to cold, i. 542. 



— silicic acid in, i. 67, 70. 



— social groups, i. 585. 



— some attached, some free, i. 40. 



— structure and light, i. 388. 



— swarms and filaments, i. 585, 586. 

 Diatomin, pigment of Diatoms, ii. 625. 

 Diavolezza, Switzerland, soil and air tent 



peratures, i. 525. 

 Dichogamous flowers, ii. 307, 310. 

 Dichogamy and hybridization, ii. 314. 



— in Saxifraga rotundifoha, ii. 308. 



— nature of, ii. 134, 309. 

 Dicksonia, aerial roots, i. 753. 



— caudex, ii. 705, 714. 



— sorus and indusium, ii. 708. 

 Dicksonia antarctica. aerial roots, i. 714. 

 Diclines irregulares, of de Jussieu, ii. 602. 

 Dicotyledones, ii. 728. 



— definition of, earlier subdivisions, i. 15. 



— distinctive characters, ii. 748. 



— of de Jussieu, ii. 602. 



— sub-classes, ii. 748. 

 Dicotyledons, ii. 617. 



Dicranodontium aristatum. vegetative pro- 

 pagation, ii. 458. 



Dicranodontium longirostre, habitat, i. 109. 



Dicranum, absorptive felt, i. 86. 



Dicranum congestum, habitat, i. 109. 



Dicranum elongatum, habitat, i. 113. 



Dicranum Sauteri, exclusive habitat, i. 119. 



Dicranum scoparium, habitat, i. 109. 



DictamnuB, stamens as insect platform, ii 

 225. 



Dictamnus fraxinella, scent, ii. 203. 



Dictydium cernuum, sporangia, ii. 491, 618. 



Dictydium umbilicatum, life-history, i. 572. 



Dictyodromous, venation, i. 630. 



Dictyonema form, of Cora, ii. 695. 



Dictyophora phalloidea, ii. 691. 



Dictyosphserium, life-cycle, ii. 636. 



Didymium, i. 573. 



Didymodon ruber, parthenogenesis, ii. 464. 



Diervilla, twisting of intemodes, i. 4Z7. 



Diervilla Canadensis, erect and pendent 

 twigs, i. 417. 



Diervilla rosea, ovules and attraction of pol- 

 len-tubes, ii. 414. 



Diffusion, through membrane and free, i. 59. 



Digestion, by Nepenthes pitcher, i. 135. 



— in Aldrovandia, i. 153. 



— of prey, by Dionsea, i. 150. 



