812 



INDEX, PART II. 



Heteroclinous, 358. 

 Heterocyclic, 500. 

 Heterocyst, 232 (Fig. 164). 

 Heteroecism, 304. 

 Heterogamy, 80, 225, 275. 

 Heteromerous lichen-thallus, 321. 



floral whorls, 500. 

 Heterophylly, 57, 390, 427, 463, 486 



(Fig. 306). 



Heterosporous, 70, 375, 380, 431. 

 Heterostylism, 455. 

 Hilum, 437. 



Histological differentiation, 92. 

 Histology, 89. 



of Gymnosperm, 464. 



of Phanerogamia, 440. 



of Pteridophyta, 374, 396, 412, 

 418, 422, 426, 428. 



of the development of secondary 



members, 184. 



Holoblastic embryogeny, 13, 441. 

 Holocarpic, 286, 290. 

 Homoblastic embryogeny, 13. 

 Homochlamydeous, 512. 

 Homoiomerous lichen-thallus, 321. 

 Homology, 1. 



Homosporous, 70, 375, 380. 

 Hook-climbers, 685. 

 Hormogonium, 232 (Fig. 165). 

 Host, 711. 

 Humus, 710. 

 Hybrid, 457, 775. 

 Hybridisation, 457, 775. 

 Hydrogen, 710, 712. 

 Hydrotropism, positive, 683. 

 Hymenial layer. 299, 310. 

 Hymenophore, 310, 316 (Figs. 221, 222). 

 Hymenium, 310 (Figs. 219, 223). 

 Hypha, 92, 273. 

 Hypobasal cell, 15, 329, 372. 

 Hypocotyl, 446. 

 Hypoderma, 160. 

 Hypogean cotyledons, 446. 

 Hypogynous, 495 (Fig. 310). 

 Hypouasty, 60, 742. 

 Hypophysis, 444. 

 Hypopodium, 45. 

 Hypsophylls, 59, 76, 431. 

 Hypsophyllary leaves, 57 (Fig. 36), 59, 

 76, 691. 



Ice, formation of, 672 (Fig. 467). 



Id, 782. 



Imbibition theory, 704. 



Imparipinnate, 52 (Fig. 32). 



Incubous leaves, 346 (Fig. 245). 



Incumbent, 604. 



Indefinite inflorescences, 490. 



In dehiscent fruits, 460. 



Indigo, 708. 



Induced movements, 742. 



Indusium, 72 374, 391. 



inferum. 391. 



laterale, 391. 



superum, 391. 

 Inferior ovary, 495. 

 Inflorescence, 76, 431, 490. 

 Infundibuliform, 514. 

 Initial cells, 145. 

 Innate, 516. 



Innovation, 39, 356, 370. 

 Innovation-shoot, 36, 43. 

 Inorganic ash of plants, 709. 

 Inorganic compounds, 706. 

 Insertion of leaves, 21. 

 Integument, 72. 

 Intercalary growing-point, 17 (Fig. 7), 



22 (Fig. 10). 

 Intercalary growth, 223 (Fig. 159), 224, 



(Fig. 160). 

 Intercellular spaces, 130 (Fig. 89). 



lysigenous, 130. 



schizogenous, 130. 



substance, 128. 

 Interfascicular cambium, 191. 



conjunctive tissue, 166, 170. 

 Internal hairs, 133. 

 Internode, 21. 

 Interruptedly pinnate, 52. 

 Interstitial growth, 16. 

 Intine, 69, 117, 434. 

 Intra-semiual development, 440. 

 Intra-stelar tissue, 151, 166. 

 Introrse, 520. 

 Intussusception, 762. 

 Inulin, 114 (Fig. 73), 708. 

 Invert-enzyme, 724. 

 Involucel, 491. 

 Involucral leaves, 357. 



scales, 338. 

 Involucre, 79, 325, 338, 491 (Fig. 309), 



691. 



Iodine, 716. 

 Iron, 713. 

 Irregular spontaneous variations in 



rate of growth, 739. 

 Irritability, 667, 670, 742, 755. 



conditions of, 760. 



localisation of, 755. 



to differences in the degree of 

 moisture in the surrounding 

 medium (hydrotropism), 755. 



to direction of incidence of the 

 rays of light (heliotropism),747. 



to mechanical stimuli, 742. 



to the directive influence of gravity 

 (geotropism), 751 (Fig. 482). 



to variations in the intensity of 

 light, 744. 



to variations of temperature, 743. 

 Isobilateral arrangement, 29. 



symmetry, 8, 508. 



