432 



INDEX 



parents, 382, 387, 388 (fig.) ; 

 natural, 385 (fig.), 388, 389; 

 result of crossing with parent, 

 386 ; segregation of characters 

 in, 384-8, 390. 



Hydathodes, 144-8 (figs.), 149, 

 179 ; function of, 147 ; me- 

 chanism of, 147. 



Hydnum, 250 ; H. repandum, 251 



(fig-)- 

 Hydra viridis, " green cells " of, 



260. 



Hydrocarbons, 62. 

 Hydrocotyle, 115. 

 Hydrolysis, 46, 54, 55. 

 Hylocomium, leaf of, 275 (fig.). 

 Hymenium of, Ascomycetes, 240 



(fig.), 242 ; Basidiomycetes, 



248, 249 (fig.), 250 ; Cystopus, 



232 ; Rust-Fungi, 247. 

 Hymenomycetes, 407. 

 Hymenophyllaceae, 296, 301. 

 Hymenophyllum tunbridgense, 296, 



297 (fig.). 



Hyoscyamine, 61, 62. 

 Hyoscyamus niger, 61. 

 Hypericum perforatum, secretory 



cavities of, 151. 

 Hypertrophy, 232. 

 Hyphae (of Fungi), 230, 231, 232, 



233 (fig.), 241, 243 (fig.), 248. 

 Hypnum, 274 (fig.), 275 (fig.), 276. 

 Hypocotyl, structure of, 89 (fig.), 



n8 (fig.). 

 Hypoderm, 92 (fig.), 95, in, 162, 



343, 344 (fig-)- 

 Hypogynous flowers, 354. 



Iceland Moss (Cetraria islandica), 



258, 261 (fig.). 

 Ice-plant (Mesembryanthemum crys- 



tallinum), 94, 167. 

 Ilex aquifolium, 127 ; leaf-structure 



of, 92 (fig.), 95, in, 113, 160 



(fig-)- 



Illumination. See Light. 

 Imbibition water, 10, 26, 42. 

 Immunity, 253, 384. 

 Incrustation of cell-walls, 39, 204, 



206. 



Indiarubber, 157. 

 Indiarubber-plant (Ficus elastica), 



157; leaf of, 39, 95, no. 

 Indican, 48. 



Indigo-plant (Indigofera), 48. 

 Indirect nuclear division (mitosis), 



22-5 (figs.). 



Individual variations, 374-8 (figs.), 



380. 

 Indusium (of Ferns), 296 (fig.), 297 



(fig.), 298 (fig.), 299. 

 Infection, 232, 234, 235, 242, 246, 



247, 253, 267. 

 Inheritance, 374, 379 ; in pure 



lines, 377, 378 ; of acquired 



characters, 380. 

 Injury, effects of, 26, 48, 116, 142, 



216, 252. 

 Ink, 60. 



Insect-galls, 60, 142, 143 (fig.). 

 Insect-pollination, 148, 326, 354, 



355, 361, 373- 

 Insectivorous plants, 144 ; digestive 



glands of, 149, 150 (fig.). 

 Integument of, Angiosperms, 357 



(fig-), 358 (fig.), 359, 37 



Conifers, 346, 347, 349 (fig.) 



Cycads, 325 (fig.), 326, 327 



Lyginopteris, 331, 332, 333 



(fig-). 



Intercalary meristems, 21. 



Intercellular spaces, development 

 of, 26 ; of aerenchyma, 174, 

 175 (fig.) ; of aquatics, 171 

 (fig.), 175, 176 (fig.), 177; of 

 bog-plants, 178; of leaves, 

 96, 107 et seq. (figs.), 170, 

 343 ; of Lichens, 259 ; of 

 marsh-plants, 174, 175 (fig.) ; 

 of Moss-sporogonium, 284 ; of 

 root, 66 (fig.), 67 ; of second- 

 ary wood, 124 ; of stems, 88 ; 

 secretory , 151, 152 (fig.). 



Interfascicular cambium, 118 (fig.), 

 120. 



Interval between pollination and 

 fertilisation, in Angiosperms, 

 364 ; in Conifers, 350. 



Intrafascicular cambium, 118 (fig.). 



Introduction of new forms, 392, 



393- 



Inulase, 46, 53. 



Inulin, n, 44, 45, 53 ; hydrolysis 

 of, 46, 53, 55 ; reactions of, 

 44, 47 ; sphere-crystals of, 



44, 45 (fig-). 



Invert sugar, 46. 



Invertase, 46, 53, 55, 256 ; extrac- 

 tion of, 54. 



Involucre, of Liverworts, 280, 281 

 (fig.), 283 (fig.) ; of Mosses, 

 279, 280. 



Iodine, in Seaweeds, 15. 



Iodine-solution, 401 ; and alka- 

 loids, 6 1 ; and cellulose, 31 ; 



