INDEX 



559 



leaves, 454 ; intermittent stimulation in, 

 438 ; use of klinostat, 430 ; Knight's 

 research, 430; correlative influences in, 

 450 ; curvature in, see Curvature ; after- 

 effects in, 437 ; negative, 431 ; in ortho- 

 tropic organs, 429 ; perception in, 440 ; 

 in plagiotropic organs, 445 ; positive, 

 431 ; latent period in, 439 ; protoplasmic 

 movement in, 444 ; chain of stimuli in, 

 444 ; in rhizomes, 446 ; rest position in, 

 440, 447 ; in lateral roots, 447 ; in lateral 

 branches, 448 ; statolith theory in, 442 ; 

 disposition of organs to, 450-2 ; torsion 

 in, see Torsions ; in twining plants, see 

 Twining plants ; in conjunction with 

 heliotropism, 476. 



Cermination, capacity for, 341 ; of seeds, 

 translocation of materials in, 147; con- 

 ditions of, 252. 



Glucosides, 4, 176. 



Glutamin, see Amido-compounds. 



Glycerine, diosmosis of, 19; as a product of 

 fermentation, 210; as a nutrient, 179; 

 esters, 4. 



Glycogen, 189. 



Graft hybrids, 381. 



Grafts, 333. 



Gravity, its activity cancelled by the klino- 

 stat, 429 ; as a releasing stimulus, 436 ; 

 influence of, on secondary growth in 

 thickness, 314 ; on growth in length, 314; 

 on direction, see Geotaxis, Geotropism ; on 

 symmetry, 313; replaced by centrifugal 

 force, 430; intensity of, 430; direction 

 of 313, 440; liminal intensity of, 439. 



Growth, 358 ; influence of poisons on, 316 ; 

 of oxygen on, 316; duration of, 394; 

 embryonic, 284 ; and reproduction, 358 ; 

 without reproduction, 362 ; rate of, 293 ; 

 of branches, see Branches ; of proto- 

 plasm, 259 ; spasmodic variations in, 

 392 ; distribution of, in branches, see 

 Branches ; of the cell, artificial, 260 ; of 

 the cell-wall, see Cell-wall ; movements, 

 421,529; capacity for, 300 ; periodicity 

 in, 284, 295 ; zones of, 288. 



Habitat, 389 ; adaptation to, 253. 



Halophytes, 97, 319. 



Haptotropism, 487 ; in Algae, 499; in Dro- 

 sera, 496 ; in Fungi, 499 ; in tendrils, 487. 



Harmonic dwarfing, 315. 



Harmonious development, 252. 



Haustoria, induced by contact, 496. 



Heat, production of, 399. 



Heating, due to respiration, 400; due to 

 radiation, 43. 



Heat-rigor, 300. 



Heliotropism, 460 ; in Avetta, 469 ; rela- 

 tion of, to geotropism, 460 ; in diffuse 

 and direct light, 466 ; in dorsiventral 

 organs, 464, 466 ; sensitivity in, 463, 

 469 ; excitation in, 469 ; surface position 



in, 466 ; curvature in, see Curvature ; 

 light intensity in, 463 ; in nature, 464 ; 

 negative, 460; in orthotropic organs, 

 461 ; in Paniceae, 468 ; in conjunction 

 with geotropism, 476 ; perception of in- 

 tensity of light in, 472. 475 ; of direction 

 of light in, 471 ; localization of percep- 

 tion in, 468, 470, 471 ; in plagiotropic 

 organs, 464, 467 ; positive, 460 ; latent 

 period in, 473 ; primary influence of light 

 in, 474 ; profile position in, 466 ; move- 

 ment in, influenced by stimuli, 462 ; se- 

 quence of stimuli in, 475 ; liminal inten- 

 sity of stimulus in, 462, 473 ; torsions in, 

 see Torsions ; Weber's Law applied to, 

 473 ; wave lengths of light in, 474. 



Heredity, 376, 383 ; material basis of, 376, 

 377. 



Heterotrophic plants, nutrition of, in rela- 

 tion to carbon, 178 ; to nitrogen, 181 ; to 

 humus, 183 ; enzyme formation in, 183 ; 

 metabolism in, 188. 



Hibernation, 341, 348 ; respiration during, 

 341. 



Holdfasts, 315. 



Hook climbers, 455. 



Humidity of air, influence of, on transpira- 

 tion, 39; on growth, 318, 342. 



Humus plants, 183, 241. 



Humus soils, 100. 



Hybrids, hetero- and homo-dynamic, 373 ; 

 intermediate forms in, 373 ; new charac- 

 ters in, 374; reversion in, 374; segrega- 

 tion in, 375; sterility of, 376; vegetative 

 power of, 374. 



Hydathodes. 57. 



Hydrocarbon, as a product of assimilation, 

 no. 



Hydrogen, as a product of fermentation, 

 218. 



Hydrolysis, 150, 152. 



Hydrophytes, 253. 



Hydrotaxis, 548. 



Hydrotropism, 484. 



Hygrophilous plants, 390. 



Hygroscopic movements, 406. 



Hypertrophy, 321. 



Hyponasty, 530. 



Ice, formation of, 300. 



Idioplasm, 377; distribution of, in the 



plnnt, 379 ; in the cell, 377. 

 Imbibition water, 415. 

 Impacts, external, in slinging movements, 



426, see Stimuli. 

 Impaiiens, ejaculatory movements in, 424. 

 Increment, in growth, 288 ; maximal, 293. 

 Indefinite shoot, 277. 

 Individual variation, 387. 

 Induced movement, 428, 521. 

 Influences, external, on growth, 253, 298 ; 



correlative, 251, 326 ; of other organisms, 



320. 



