430 



INDEX 



pic reactions, 160, 161 ; twining in 

 darkness, 30, of Wistaria, 40. 

 Dewevre, 25, 104. 

 de Wildeman, 317. 



Dewitz, 358. 



Diageotropism, in twiners, 37. 



Diameter, influence of, on curvature, 18. 



Dianthus bannaticus, geotropism of adult 

 nodes of, 202, 231, 235. 



Diastase, chemotropic action of, 181. 



Diastole of vacuoles, 295. 



Diathermatropism, 177. 



Diatoms, grouping of, 274; mode of move- 

 ment of, 270, 271; energy and speed 

 of, 272 ; phototaxis of, 325 ; stimu- 

 latory plasmolysis of, 75. 



Diatropism, definition of, 155. 



DictamnuS) origin of movement in flowers 

 of, 27, in stamens of, 24; D. albus, 

 flaring of, 384. 



Dictydium ambiguum, influence of light on 

 streaming of, 318. 



Dictyostelium, 183, 304. 



Dictyuchus monosporus, oxytropism of, 

 182. 



Didymium serpula, rate of movement of, 

 276, 284. 



Diervilla lonicera, torsion of, 260, Fig. 49. 



Dietz, 83, 105, 165, 183, 188. 



Diffusion, relation of, to streaming, 285, 



359- 



Digitalis, changes of tone in, 205. 



Digression movements, 287. 



Dingier, 24. 



Dionaea, 64, Fig. 24, 85, 86, in ; action of 

 hairs of, 67 ; closure of leaf of, 68 ; 

 electrical currents in, 394, 395, 397, 

 398 ; influence of anaesthetics on, 144, 

 of chemical excitation on, 88 ; irritability 

 of, 8 1 ; seismonic, of cotyledons of, 80 ; 

 perceptive organs of, 87 ; propagation 

 of stimuli in, 91, 92, 93; protoplasmic 

 aggregation in, 78 ; stimulation of, by 

 transpiration, 65, 66 ; D. mustipula, 

 influence of ammonium carbonate on, 

 30 ; latent period of, 68 ; summation of 

 stimuli in, 69. 



Dioscorea batatas, heliotropism of, 42 ; 

 twining of, 36 ; influence of etiolation 

 on, of, 30 ; D. sinuata, 42. 



Dippel, 271. 



Dipsacus, protoplasmic extrusions of, 149. 



Discomycetes, dispersal mechanism of, 149. 



Discoplea, 383. 



Disks, influence of contact on, 47. 



Dispersal, 416 ; movements, 146 ; in- 

 fluence of light and temperature on, 153. 



Dissociation, influence of, on chemotaxis, 

 350,420. 



Diurnal movements, instances of, 101 ; 

 uses of, loo. 



Dixon, 368, 373. 



Dodel, 153, 293, 295, 298, 315. 



Doflein, 303. 



Dorsiventrality, induction of, in branches, 

 253, in Marchantia, 251, in prothalli, 

 252, in runners, 250, 251. 



Dracophyllum, orientation of leaves of, 255. 



Driesch, 208. 



Drosera, 99; chemonasty of, 86; conduc- 

 tion of stimuli in, 90, 91 ; influence 

 of absence of oxygen on tentacles of, 

 143, of ammonium carbonate, 30, of 

 anaesthetics, 145, of chemical excita- 

 tion, 88, 90, of induction-shocks, 146, 

 of stimuli on excitability of, 70 ; irrita- 

 bility of tentacles of, 69, 84, 85, 87 ; 

 propagation of stimuli in, 92, 93 ; pro- 

 toplasmic aggregation in, 78 ; rate of 

 transference of stimuli in, 94; streaming 

 in, 342 ; D. binata, irritability of, 86 ; 

 D. longifolia, influence of light on 

 flowers of, 106 ; D. rotundifolia, ill ; 

 stimulated leaf, 83, Fig. 27. 



Drosophyllum, aggregation in, 90 ; D. lusi- 

 tanicum, chemical excitation of, 88. 



Dubois, 382, 383 ; on luminosity, 387, 

 388 ; on production of electricity, 389, 



394, 397- 



du Bois-Reymond, 390. 



Dubrunfaut, 378. 



Duchartre, 30, 173. 



Duclaux, 378. 



Dudresnaya, chemotropism of, 180. 



Dufour, 27. 



Duhamel, I. 



Dutrochet, 3, 21, 80, 93, 95, 189, 191, 208, 

 255, 325 ; on anatomy of tropic organs, 

 243, 244 ; on causation of tropism, 

 223 ; circumnutation of tendrils, 24 ; 

 conduction of stimuli in Mimosa, 94; 

 curvature of pulvini, 138, 141, 143 ; 

 daily periodicity, 112 ; dehiscence of 

 fruits, 148, 151, 152; ephemeral 

 flowers, 23 ; heliotropism of climbers, 

 4 1 ; influence of acid and alkali on stream- 

 ing, 343 ; of external conditions on, 

 314, 316; of temperature on circum- 

 nutation, 29 ; on production of heat, 

 370, 372, 373, 374, 376 ; on streaming, 

 289, 290, 291, 355, 357; on spon- 

 taneous and induced movements, 25 ; 

 on tropic stimuli, 161, 163, 166, 173, 

 176. 



Ecballium, dehiscence of, 148. 



EccremocarpuS) 42 ; E. scaber, influence 

 of temperature on circumnutation of, 

 29. 



Echinocystis lobata, discriminatory power 

 of tendril of, 48 ; immotility of hori- 

 zontal tendril of, 28. 



Ectocarpusfirmus, 324. 



Ectoplasm, regulation of ciliary movement 

 by, 269; retrogressive changes in, 

 279. 



