732 



BOTANY 



Heliotactic movement, 277 



Heliotropism, 274, 275 



ffeliotropium, 658 



Helleborus, *36, 574, *577 ; epidermis, 



*102 ; stoina, *206 

 Helobiae, 522 

 Helvellaceae, 394 

 Hemerucallis, *476 

 Hemidesmi radix, 656 

 Hemidesmus, 656 

 Hemlock, Conium 



Hepaticae, 424, 425 ; apical cell, 155 ; 

 conducting strands, 110 ; elaters, 

 271 ; form, 14 

 Herbs, 29 

 Hercogamy, 311 

 Heriiiaria, 571 

 Hesperidin, 80 

 Heterobasidion, 412 

 Heterocontae, 351 

 Heterodynamic hybrids, 313 

 Heteroecious Uredineae, 406 

 Heterogenesis, 300 

 Heteromerous Lichens, 416 

 Heterophylly, 35 

 Heterosporous Pteridophyta, 441 

 Heterospory, 471 

 Heterostyly, 310 

 Heterotype division, 86 

 Hevea, 617 

 Hibisceae, 626 

 Hibiscus, 626 



Hieracium, *682 ; apogamy, 93, 518 ; 

 apospory, 518 



Hilum, 474 



Hippocastanaceae, 620 



Hippophiie, 631 



Hippuris, 632 ; vegetative cone, *157 



Histology, 52 



Holcus, 530 



Homodynamic hybrids, 313 



Homoiomerous Lichens, 416 



Homology, 9 



Homosporous Pteridophyta, 441 



Homotype division, 86 



Honeysuckle, Lonicera 



Hoodia, 656 



Hop, Humultis 



Hordeum, 528 ; root apex, *159 



Hornbeam, Carpin-us 



Horse-chestnut, Aesculus 



Horse-tail, Equisetum 



Hoya, 656 



Humboldtia, 235, *236, 605 



Humuhis, *565, 566 ; glandular hair, 

 107, 108 



Humus, 199 ; plants, 231 



Jfura, fruit, 320 



Hyacinthus, 541 



Hyaloplasm, 58 



Hybridisation, 313, *315 



Hydathodes, 108, 123, 210 



Hydneae, 410 



Hydnaphytuni, 672 



Hydnum, *410 



Hydra, symbiosis with algae, 234 



Hydrangea, 593 



Hydrastine, 579 



Hydrastis, 579, *580 



Hydrastia rhizoma, 579 



Jlydrodutri-s, 524 



Hydrocharitaceae, 524 



Hydrocotyle, 640 



Hydrocyanic acid, 226 



Hydrodictyon, 356 



Hydrogen, in plants, 187, 188, 189 



Hydrolapathum, *13 ; structure, 1;V2 



Hydrophilous plants, 307 



Hydrophyllaceae, 657 



Hydropterideae, 450, 466 



Hydrotropism, 286 



Hygroscopic movements, 271 



Hylocomium, 438 



Hymenolichenes, 420 



Hymenomycetes, 408 



Hymenophyllaceae, 449 



Hyoscyami folia, 663 



Hyoscyamus, *474, 663, *667 



Hypecoum, 587 



Hypericum, *628 



Hyphae, 255, 38" ; rate of growth of, 255 



Hyphaene, 530 



Hypholoma, *400 



H A onum, *435, 438 



Hypocotyl, 162 



Hypoderma, 118, 121 



Hypogeal germination, 323 



Hypogynous, *505, 506 



Hyponasty, 272 



Hypophysis, 516 



Hysterophyta, 643 



Iberis, 591 



ice, formation of, in tissues, 176 



Idioblasts, 73, 116 



Ilex, *619 



Illidum, 579 ; ethereal oil, 79 



Imbibition, movements dependent on, 270 ; 



water, 194 



Imbricated leaves, 38 

 f,,ij>ufie)is, 611 ; bundles, 109 ; *116 ; 



collenchyma, *67 

 India-rubber tree, FICHS 

 Indian cress, Tropaeolum 

 Indian hemp, Cannabis 

 Indican, 226 

 Ind-igofera, 609 

 Indirect nuclear division, 81 

 Indusium, 448 

 Inflorescence, 509 

 Insectivorae, 591 

 Insectivorous plants, 43, 227, 236 



