INDEX 



437 



bility in, 196, 197 ; opposed move- 

 ments of, 26 ; orientation of, 255, 256, 

 419,420; twining, 38; variation move- 

 ments of, 22. 



Leclerc du Sablon, 106. 



Leguminosae, motile pulvini of, I ; 

 structure of, 13. 



Lehmann, 263, 268, 277, 281, 382, 385, 

 386, 387, 388. 



Leitgeb, 174, 252, 345. 



Lemna trisulca, orientation of chloroplas- 

 tids of, 328, Fig. 54. 



Lemstrom, 393. 



Lengerken, 47. 



Leontodon, closure of capitulum of, 103 ; 

 L. hastilis, growth movements of, 132, 

 133, 134 ; photonasty of, 122 ; ther- 

 monasty of, 1 14. 



Lepidium, heliotropism of, 171, 172, 173; 

 L. sativum, minimal heliotropic stimuli 

 for, 211 ; thermotropism of, 177. 



Letellier, 188, 237. 



Lewis, 332. 



Lianas, limiting diameter for twining of, 40. 



Lichens, dispersal mechanism of, 149. 



Lidforss, 420, 421 ; on chemotropism, 181 ; 

 on thermonasty, 114; influence of 

 gravity on, 127. 



Light, coloured, heliotropic action of, 174, 

 I 75> J 76; intense, orienting action of, 

 on leaves, 260, 261. 



Light, formative action of, 416 ; influence 

 of, on autonomic movement, 30 ; of 

 changes of, on position of leaves, 105 ; 



on circumnutation, 42 ; on daily 

 periodicity of leaves, 108-11 ; on 

 dehiscence and dispersal, 153; on 

 development of nodes, 249 ; of 

 runners, 250 ; on direction of 

 streaming, 292 ; on epinasty, 257 ; 



on geotropism, 249-52 ; on irrit- 

 able tone, 141, 142, 203, 206; on 

 locomotion, 306, 318 ; on opening of 

 flowers, I oo ; on orientation, 4 19, 420; 



of branches, 253, of chloroplastids, 

 327-33, of leaves, 255, of Marchantia, 

 251, of prothalli, 252 ; on stream- 

 ing and amoeboid movement, 288, 

 319, 320; on twining, 35, 40, 41 ; 



on periodic movement, 26, 27 ; 

 on position of leaves, 105-8 ; on 

 torsion, 257, 258, 259 ; on tropic 

 irritability, 1 58 ; minimal intensity of, 

 for tropic response, 210, 211, 212, 213; 

 nature of action of, 228, 229, 230 ; 

 phobic responses to, 320; summative 

 effect of, 209, 210 ; tropic and tactic 

 action of, 321 ; value of various sources 

 of, 112. 



Light-production, 382 ; composition of rays 

 of, 388 ; energy consumed in, 400 ; - 



gained from, 399 ; influence of 

 chemical substances on, 386 ; of 



temperature on, 385 ; uses of, 384, 

 by Bacteria, 382, by Fungi, 383. 



Lignin reaction, 415. 



Lilienfeld, 420. 



Linaria, heliotropism of, 174 ; L. cymba- 

 laria, 253 ; L. spuria, influence of 

 light on geotropism of flower of, 203. 



Lindemuth, 415. 



Lindley, 22. 



Lindsay, 77 ; on pulvinar mechanism, 80. 



Link, 20. 



Linnaeus, in. 



Linsbauer, 102. 



Linum iisitdtissimum, hydrotropism of, 

 183 ; transference of stimuli in, 194. 



Lippmann's capillary electrometer, principle 

 of, 278. 



Lister, 320. 



Littonia, coiling leaf-tips of, 44. 



Loasa aurantiaca, reversal of twining in, 39. 



Locomotion, influence of pulsating vacuoles 

 on, 299. 



Loeb, 188, 266, 320, 325, 337, 363, 364; 

 on phototaxis, 229 ; on symmetric 

 orientation, 216. 



Lonicera, 259 ; Z. brachypoda, rate of 

 revolution in, 21 ; L. caprifolium, 

 direction of twining in, 38. 



Loomis, 30. 



Lophospermum, coiling of, 37 ; L. scandens, 

 irritability of, 35; climbing of, 48; 

 twining petioles of, 44. 



Lopriore, 340, 342. 



Lourea 'vespertilionis^ 211. 



Low, 346. 



Luciferase, 387. 



Luciferin, 387. 



Ludloff, 361, 363. 



Ludwig, 23, 42, 46, 118, 146, 148, i49> *S> 

 264, 383, 384 ; on heat-production, 

 368 ; on luminosity, 305, 388. 



Luerssen, 326. 



Luminosity, occurrence of, 382, 383; energy 

 of, 400; influence of chemical sub- 

 stances on, 386 ; of temperature on, 

 385 ; nature and uses of, 384. 



Lunaria btennis, 211. 



Lupinus, 104, 182, 214, 418; length of 

 irritable zone in, 198 ; localization of 

 irritability in root-apex of, 197, Fig. 42 ; 

 Z. albus, 420 ; .geotropism of hypocotyl 

 of, 165, of radicle of, 234, Fig. 46 ; 

 influence of chloroform on, 145 ; 

 of gravity on sleep-movements of, 125 ; 

 - of injury on irritability of, 199 ; - 

 of oxygen, 202. 



Liitkemiiller, 274. 



Luxburg, on geotropism and growth, 417. 



LycopcrdoH) production of heat by, 366, 



373* 



Lygodium scandens, twining leaves of, 38. 

 Lysimachia nummularia, 259 ; geotropism 



of, 165 ; influence of light on, 250 ; 



