812 



INDEX, PART II. 



Heteroclinous, 358. 

 Heterocyclic, 500. 

 Heterocyst, 232 (Fig. 164). 

 Heteroecism, 304. 

 Heterogamy, 80, 225, 275. 

 Heteromerous lichen-tballus, 321. 



floral whorls, 500. 

 Heteropliylly, 57, 390, 427, 463, 486 



(Fig. 306). 

 Heterosporous, 70, 375, 380, 431. 

 Heterostylism, 455. 

 Hilum, 437. 



Histological differentiation, 92. 

 Histology, 89. 



of Gymnospermae, 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, 236, 290. 

 Homoblastic embryogeny, 13. 

 Homochlamydeous, 512. 

 Homoiomerous lichen-tballus, 321. 

 Homology, 1. 



Homosporous, 70, 375, 380. 

 Hook-climbers, 685 

 Hormogoniam, 232 (Fig. 165). 

 Host, 711. 

 Humus, 710. 

 Hybrid, 457, 775. 

 Hybridisation, 457, 775. 

 Hydrogen, 710, 712. 

 Hydrotropism, po^'itive. 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). 

 Hyponasty, 60, 742. 

 Hypophysis. 444. 

 Hypopodium, 45. 

 Hvpsophylls, 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. 32K 



Incubous leaves, 346 (Fig. 245). 



Incumbent, 604. 



Indefinite inflorescences, 490. 



Indehiscent fruits, 460. 



Indigo, 708. 



Induced movements, 742. 



ludusium, 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, 3";6, 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. 



substauce, 128. 

 Interfascicular cambium, 191. 



conjunctive tissue, 166, 170. 

 Internal hairs, 133. 

 Interoode, 21. 

 Interruptedly pinnate, 52. 

 Interstitial growth, 16. 

 lutine, 69, 117, 434. 

 Intra-seminal development, 440. 

 Intra-stelar tissue, 151, 166. 

 Introrse, 520. 

 Intussusception, 762. 

 Inulin, 114 (Fig. 73), 703. 

 Invert-enzyme, 724. 

 Involucel, 491. 

 Involucral leaves, 357. 



scales 33S. 

 Involucre, 79, 325, 333, 491 (Fig. 309), 



691. 

 Iodine, 716. 

 Iron, 713. 

 Irregular spontaneous variations in 



rate of growth, 739 

 Irritabilitv, 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 (heliotr.)pisra),747. 



to mechanical stimuli, 742. 



to the directive influence of gravity 

 (geotropism). 751 (Fi«. 482). 



to variations in the intensity of 

 light, 744. 



to variations of temperature, 743. 

 Isobilateral arrangement, 29. 



symmetry, 8, 508. 



