8j8 



INDEX. 



Humus-plants, 63, 374, 392, 



399- 

 Hyacinth, 43, 360, 419, 534i 



576. 

 — 118. 



Hyacinthus, 316, 351. 

 Hybrid vines, 784-786. 

 Hybridisation, 779, 799. 



— laws of, 780-784. 

 Hybrids, 779, 780, 783. 



— derivative and compound, 

 784. 



— properties of, 782-784. 

 Hydnora Africana, 65. 

 Hydnoreae, 63. 

 Hydnutn di-versidens, 388. 

 Hydrate of Terpin, 389. 

 Hydrocharis, 13, 255, 617. 

 Hydrodictyese, 429. 

 Hydrogen, 206, 290, 293, 



324, 382, 386, 396, 403, 



595- 



— sulphuretted, 387. 

 Hydrotropism, 601, 602, 698, 



707, 714-717. 



— 715. 



— positive and negative, 717. 

 Hygroscopicity, 588, 739, 



741- 

 Hymenomycetes, 798. 

 Hypericineae, 780. 

 Hypericum, 183, 184. 

 Hypha, 152, 380, 381, 388, 



426, 432, 453, 571, 726. 

 Hypochlorin, 318. 

 Hypocotyl, 702, 712. 

 Hypoderm, 143. 

 Hypophysis, 435, 443- 



I. 



Iceland Moss, 707. 

 Jlex aquifolium, 116. 

 Imbibition, 207, 243, 638, 



— heat of, 210. 



— water of, 209. 



— in wood, 241, 268, 

 Immature condition, 414. 

 Impatims, 177. 



• — glandulifera, 199. 



— noli-me-tangere, 640, 641, 

 791. 



Indefinite growth, 465, 466, 



483. 

 Independence of anisotropy 



and morphological nature 



of organs, 700. 



— of cell-division and the 

 morphological and phy- 

 siological nature of or- 

 gans, 433, 435. 



— of growth and cell-divi- 

 sion, 431. 



and nutrition, 412. 



Indian Corn, 343, 344, 417. 



— Cress, 533, 548, 596, 659, 

 712, 713. 



— Hemp, 184. 

 India-rubber, 172. 

 Individual, 414. 

 Inflorescence, 461, 463, 473, 



475, 496, 534, 658. 



Influence of the environ- 

 ment, 515, 516,523,537, 

 593, 594, 595, 678- 



^ on growth, 552, 554, 



555- 



— of gravitation on develop- 

 ment of growing points, 

 517-519. 



. on post - embryonic 



growth, 528, 536, 537. 



— of light on chlorophyll- 

 corpuscles, 617-620. 



on development of or- 

 gans, 522, 524. 



on flat shoots, 709, 



710. 



on growth, 554, 555- 



on leaves, 617, 621. 



on post - embryonic 



growth, 530, 536, 537. 



— of the origin of sexual 

 cells on offspring, 787. 



— of temperature on growth, 



553. 555- 



— — on protoplasmic move- 

 ments, 606, 608. 



Infusoria, 298, 606. 

 Inherited disposition, 189. 

 Injection of water in cut 



branches, 279. 

 Injury, as a stimulus, 583. 



— development of growing- 

 points caused by, 480, 

 582, 583. 



— effects of, 504, 507. 

 Insectivorous plants, 124, 



186, 345, 366, 374. 



digestion by, 377. 



nutrition of, 374, 375, 



parasitism of, 377. 



Insect-killing Fungi, 381. 



Insects and Flowers, 655, 

 657, 760, 789-797. 



Insects, relations of plants to, 

 204, 329, 537, 538, 548, 

 643. 



Insect-traps, 379. 



Integuments, 752, 754, 756, 

 760, 766. 



Intense light, effect on as- 

 similation, 311. 



Intensity of light, 713. 



influence on swarm- 

 spores, 613, 621, 



Intercalary embryonic tissue, 

 467, 468. 



Intercalary growing - point, 

 429. 



— growth, 417, 418, 481, 

 544. 



Inter-cellular canals, 181. 



— gaps, 182. 



— spaces, III, 141, 176,247, 

 264, 423, 645, 652, 655. 



Inter-fasclcular cambium, 



157. 

 Intermediate products of 



assimilation, 317. 

 Internal causes of growth, 



503. 



— disposition, 522, 678. 



— glands, 183. 



— parasites, 370. 



— structure of plants, 189, 

 503. 



Internodes, 40, 421, 471, 

 483, 549, 683, 684, 685, 

 687. 



— growth of, 540, 542-545, 



553- 

 Interpolated organs, 469. 

 Intine, 762. 

 Intra-raolecular respiration, 



395, 401, 402. 

 Intussusception, 413. 

 Inula Hellenium, 335. 

 Inulin, 323, 335, 336, 341, 



343, 357, 363. 



— ferhientation of, 342. 

 Inverted sugar, 349. 

 Invertin, 343. 

 Invertive action of yeast, 



390. 

 Iodide of starch, 310. 

 Iodine, 288. 

 Ipomsea, 669, 671. 

 - — purga, 24, 180, 640. 



— purpurea, 533, 672. 

 670. 



Irideae, 177, 780. 



Iris, 60, 144, 536, 576, 794. 



— pumila, 102. 



Iron in plants, 202, 226, 284, 



285, 287, 289, 321, 383. 

 Iron-wood, 163. 

 Irritable leaves, 641-649, 

 655. 



— movements, electric cur- 

 rents during, 650. 



mechanics of, 652,653. 



— organs, 591, 598, 600, 

 654. 



rigor in, 593-595- 



speicific energy of, 601. 



— stamens, 396, 595, 650, 

 651, 654, 655, 790. 



Irritability, 251, 368, 395, 

 481, 493, 503, 507, 513, 

 515, 530, 548, 566, 589- 

 591, 593, 594, 599, ^"i 



