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 islandicd), 



258, 26L(fig.). 

 Ice-plant (Mesembryanthemum crys- 



tallinum), 94, 167. 

 Ilex aquifolium, 127 ; leaf-structure 



of, 92 (fig.), 95, in, 113, 1 60 



(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 (Indigo/era), 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, 36i, 373- 

 Insectivorous plants, 144 ; digestive 



glands of, 149, 150 (fig.). 

 Integument of, Angiosperms, 357 



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



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, 

 J 75 (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, ii, 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 ; 



