INDEX. 



955 



Hybrids, conditions of formation, ii. 404. 



— doubling of flowers, ii. 576. 



— factors in sterility, ii. 578. 



— from races and species, ii. 581. 



— goneoclinic, ii. 559. 



— indumenta, characteristics of, ii. 564. 



— in relation to grafting, i. 215. 



— juxtaposition of parental characters in, ii. 



561, 573. 



— minute structure, ii. 565. 



— misconceptions concerning, ii. 577. 



— misstatements concerning, ii. 557. 



— natural occurrence and distribution, ii. 577, 



582, 585. 



— non-inherited characteristics, ii. 574. 



— parent proportions in, ii. 558. 



— permanence of, ii. 587. 



— potential fertility, ii. 579. 



— produced by grafting, ii. 569. 



— pseudo-hermaphrodite flowers in, ii. 578. 



— starch-grains in, ii. 566. 



— tendency to vegetative propagation, ii. 458. 



— ternary, ii. 560. 



— variation, ii. 576. 

 Hydneaj, appearance of, i. 112. 



— hymeuium, &c., ii. 688. 



Hydnora Africana, South Africa, i. 199. 

 Hydnora Americana, South Brazil, i. 199. 

 Hydnora triceps. South Africa, i. 199. 

 Hydnoracese, ii. 762. 



— anthocyanin, i. 483. 



— nature of scents, ii. 199. 

 Hydnum, raising power, i. 514. 

 Hydnum imbricatum, ii. 21, 685. 



respiratory heat, i. 498. 



Hydra, symbiosis with plants, i. 254. 

 Hydrangea Japonica, sterile flowers, ii. 187. 

 Hydrangea quercifolia, protection of pollen 



from wet, ii. Ill, 112. 



sterile flowers, ii. 187. 



Hydrilla, attachment, i. 77. 



— spiny leaves, i. 438. 



Hydrilla verticUlata, pollination, ii. 133. 

 Hydrocarbons, nature of, i. 453. 

 Hydrocharidaceae, ii. 105. 



— distinctive characters, ii. 739. 



— poUination, ii. 133. 

 Hydrocharis Morsus-ranje, ii. 739. 

 anthocyanin, i. 521. 



formation of winter-buds, ii. 804. 



habit, i. 666. 



leaf and transpiration, i. 288. 



leaf-rosettes, i. 412. 



position of stomata on leaves, i. 280. 



protective isolation by water, ii. 234. 



sprouting of winter-buds, ii. 805. 



venation, i. 633. 



Hydrocotyle Asiatica, venation, i. 631. 

 Hydrocotyle vulgaris, entire plant, ii. 789. 

 Hydrodictyacese, ii. 640. 



— description, ii. 639. 

 Hydrodictyete, ii. 606. 



Hydrodictyon, Klebs' observations on repro- 

 duction, ii. 482. 



— life-history, ii. 640. 



— multiplication, i. 588. 



— reproduction, i. 574. 



— thallidium, ü. 23. 

 Hydrodictyon utriculatum, ii. 24, 640. 



swarming of protoplasm, i. 36. 



Hydrogen, combined with carbon, i. 453. 

 Hydropeltidinse, of Braun, ii. 605. 

 Hydrophyllacese, ii. 771. 

 Hydrophyllum, emerging of leaves from soil, 



i. 639. 



— unfolding leaves, i. 351. 

 Hydrophytes, absorption of carbonic acid, i. 



367. 



— ash of, i. 66. 



— as lime accumulators, i. 260. 



— attachment m relation to nutrition, i. 77. 



— floating contrivances, i. 638. 



— free and submerged, i. 76. 



— mechanical tissue, i. 735. 



— nutrition, i. 77. 



— parasites on, i 169. 



— require large supply of food-salts, i. 78. 



Hydrophytes, saprophytic, non-green, at- 

 tacked by species of same group, i. 170. 



— swelling of dead ceU-membranes and 



retention of mud, i. 267. 



— unicellular, movements and light, i. 382. 



— venation, i. 636. 



— where very abundant, i. 104. 

 Hydropterides, ii. 709, 710. 



— of Braun, ii. 605. 



— sorts of spores, ii. 704. 

 Hydrotropism, in roots, i. 775. 

 Hydroxyl, i. 454. 

 Hydrurus, in cascades, i. 79. 



— structure, i 590. 

 Hygrobise, ii. 784. 



Hygrometer, mericarp of Erodium used as, 



i. 619. 

 Hylocomium, ii. 480. 

 Hylocomium splendens, ü. 15, 700. 



habitat, i. 109. 



Hymenial layer, and respiration, i. 498. 

 Hymenium, luminous, i. 503. 



— of Amanita, portion, ii. 21. 



— of Hyrnenomycetes, ii. 688. 

 Hymenocystis, protection of sporangia, ii. 13. 

 Hyrnenomycetes, as Lichen-fungi, ii. 693. 



— basidia, ii. 680. 



— characteristics, ii. 687. 



— luminous, i. 502. 



— range of forms, ii. 688. 



— respiration experiments, i. 498. 



— similarity of spawn, dissimilarity of fructi- 



fications, ii. 491. 

 HymenophyUacese, absorption-cells in, i. 86. 



— description, kc, ii. 705. 



— greenness of prothallia and habitat, i. 



384. 



— in Blue Mountains, Jamaica, ii. 457. 



— sori, li. 10. 



Hymenoptera and aminoid scents, ii. 207. 



— and Calceolaria Pavonii, ii. 379. 



— eaters of pollen, ii. 167. 



— gall-formation, ii. 527. 

 Hyoscyamus, calyx and fruit, ii. 434. 



— corolla and autogamy, ii. 366. 



— cross-fertilization, ii. 305. 



— poUen deposition, ii. 278. 

 Hyoscyamus albus and frost, ii. 407. 

 Hyoscamus niger and cattle, i. 451. 



odour, i. 431. 



Hypanthium, forms of, ii. 780. 

 Hypecoum, corolla and autogamy, ii. 369. 



— nectaries, ii. 178. 



Hypecoum grandiflorum, autogamy, details, 

 ii. 370. 



flower, ii. 181, 369. 



Hypecoum pendulum, weather and auto- 

 gamy, Ü. 391 



Hypecoum procumbens, honey concealment, 

 ii. 182. 



Hypericineae, pollen-grains, ii. 102. 



Hypericopsis persica, salt on leaves and stem, 

 i. 236. 



Hypericum, alluring floral tissue, ii. 170. 



— autogamy, ii. 340. 



— hybrids, ii. 584. 



— staminal insect platform, ii. 230. 



— twisting of intemodes, i. 417. 

 Hypericum humifusum, weather and auto- 

 gamy, ii. 391. 



Hypericum olympicum, stamen, ii. 87. 

 Hypericum perforatum, autogamy, ii. 340. 

 Hypertrophy, caused by Fungi, ii. 519. 

 Hyphse, fungal attacking plants, i. 165. 



attraction by ovules, ii. 414. 



constitute mycelium, i. 99. 



development from spore, i. 163. 



mechanical changes due to, i 265. 



— — mechanical force, i. 513. 



modes of growth, i. 589. 



of Empusa Musoai, ii. 672. 



of Entomophthora, ii. 672. 



of Erysipheai, ii, 59. 



prey upon cell- walls, &,c., i. 167. 



symbiosis with roots of Phanerogams, 



i. 249. 

 tips of, decomposing power, &c., i. 164. 



Hyphse of Lichen, chemical and mechanical 

 action, i. 257. 



— of Zygomycetes, ii. 673. 

 Hyphajne coriacea, caudex, i. 714. 

 Hyphsene thebaica, inflorescence, i. 745. 

 Nile, caudex, i. 714. 



Hypheothrix, schizomycetoua member of 



sub-aqueous Lichen-like plants, i. 248. 

 Hyphodromous venation, i. 636. 

 Hypnosporangium, of Botrydium, ii. 643. 

 Hypnum cordifolium, home of, i. 105. 

 Hypnum falcatum, hme incrusted, i. 260. 

 Hypnum fluitans, &o., and hybridization, ii. 



583. 

 Hypnum giganteum and H. sarmentosum, 



home of, i. 105. 

 Hypnum moUuscum, absorption of aqueous 



vapour, i. 218. 

 Hypnum rugosum, parthenogenesis, ii. 464. 

 Hypnum triquetrum and H. Crista-cast- 



rensis, habitat, i. 109. 

 Hypnum uncinatum and H. reptile, habitat, 



i. 109. 

 Hypochairis, autogamy, ii. 372, 375. 



— maculata, opening and closing, ii. 218, 217. 

 Hypochlorin, from chlorophyll, i. 372. 

 Hypocotyl, i. 655. 



— and cotyledon-stalks, relative proportions, 



i. 621. 



— buds on, ii. 28. 



— functions, i. 650. 



— of Rhizophora, i. 602, 604. 

 Hypocrateriform, applied to flowers, ii. 111. 

 Hypoderma Lauri, habitat, i. 118. 

 Hyssopus officinalis, colour and bees, ii. 195. 

 Hysterophyta, of Endlicher, ii. 604. 



Iberis amara, light and growth, ii. 508. 



peripheral flowers, ii. 186. 



umbellate raceme, ii. 184. 



Iberis gibraltarica, peripheral flowers, ii. 



186. 

 Iberis umbellata, peripheral flowers, ii. 186. 

 Ice, as preservative agency, i. 262. 



— in frozen plant, i. 540. 



— melting by plant growth, i. 500. 

 Iceland Moss. See Cetraria islandica. 

 Ice-plant. See Mesemhryanthemum cristal- 



linum. 



Ichneumon, pollinates Listera, ii. 256. 



Icbueumon-fly, protection of bud-gall against, 

 ii. 542. 



Ichthyosoma. See Sarcophyte sanguinea. 



Idioplasm, views regarding, ii. 493. 



Ilex Aquifolium, bristle-like teeth, i. 433. 



cuticle of leaf, i. 310. 



Illecebrum, prostrate shoot, i. 664. 



lUecebrum verticillatum, sul)-aqueoi;s fer- 

 tilization, ii. 391. 



" Illegitimate union ", in crossing, ii. 405. 



lUicium anisatum, follicle, ii. 431. 



lllicium religiosum, poisonous, ii. 488. 



Illumination, adaptation to, i. 394. 



— bright, effects on plants, ii. 407. 



— effect of varying intensity, i. 381. 



— varied adaptation of leaves to, i. 423. 

 Imagination, value of, i. 17. 

 Imbibition, freedom of, i. 88. 

 Immortelle. ^eea\?,o Hdichrysumarenanum. 

 Immortelles, ii. 766. 



— hairy, time of appearance in dry regions, 



i. 318. 



— hairy covering in summer, 1. 319. 

 Impatiens, and insect visits, ii. 223. 



— cleistogamy, ii. 393. 



— pollen deposition, ü. 277. 



— root-hairs, i. 91. 

 Impatiens glanduligera, i. 656. 



cross-fertilization, ii. 306. 



Impatiens Noli-tangere, cleistogamy, ii. 394. 

 cross-fertilization, ii. 306. 



leaf and illumination, i. 286. 



seed-dispersal, ii. 835. 



sheltering of pollen, ii. 108, 109. 



