INDEX 



447 



statolith theory of, 223, 224; dis- 

 proof of, 418. 



Statocysts, 224. 



Statolith, 224 ; theory, 223, 417, 418. 



Steinbrinck, 150; on cohesion -mechanism, 

 151,152. 



Stem, 8l. 



Steiner, 224. 



StellaHa media, hydronastic flower of, 117 ; 



- influence of light on, 100, 106 ; 

 sleep-movements of, 103. 



Stemonitis fusca, rate of movement of, 276. 



Stems, adult, curvature of, 12; split, cur- 

 vature of, 241 ; twining of, 34. 



Stenstrom, 117. 



Stentor, irritable zones in, 363. 



Steyer, 82, 145, 165, 173, 177, 188, 189, 

 232 ; on aerotropism, 182 ; on hydro- 

 tropism, 183, 184, 187 ; on localization 

 of sensation, 195. 



Stigeoclonium^ 293. 



Stigmas, movements of, 82 ; autonomic, 

 24. 



Stimulation, influence of, on temperature, 

 78 ; recovery from, 9, 10. 



Stimulators, 67, 76. 



Stimuli, conditions for action of, 216, 217 ; 

 conjoint action of, 1 58, 1 59, 208 ; 

 mechanical propagation of, 91 ; 



- path of, 94, 95 ; - - rate of, 93 ; 

 minimal, 209, 210 ; path of, 201, 202 ; 

 perception of, 193, 194, 195, 196 ; re- 

 lation of intensity of, to response, 

 213-16 ; transference'of, 199, 200, 422 ; 

 types of, 2 ; chemical, 90, 91, rate 

 o(> 93) path of, 94, 95 ; tonic, defi- 

 nition of, 6. 



Stipa, hygroscopic awns of, 151. 



Stolons, importance of nutation of, 24. 



Stoma, influence of centrifugal force on 

 initial cell of, 336. 



Strangulation, by twiners, 40. 



Strasburger, 37, 65, 150, 153, 182, 264, 265, 

 269, 293, 294, 298, 311, 337, 345, 356, 

 358 ; on directive action of light, 228 ; 

 on influence of arrest on irritability, 

 204; --of light on zoospores, 318, 

 320; - of temperature, 315; on 

 nuclear movements, 301, 302, 303, 

 304 ; on phototaxis, 322, 323, 324, 325, 

 326 ; on reaction of plasmolysed roots, 

 201. 



Streaming, in Diatoms, 271 ; uses of, 

 271, 272 ; influence of contraction on, 

 in stamens of Cynareae, 78 ; of in- 

 duction-shocks on, 356, Fig. 63 ; of 

 injuries on, 359; of light on, 319, 

 320; of mechanical shocks on, 357, 

 358 ; on phototropic orientation, 

 220; of plasmolysis on, 355 ; of 

 temperature on, 313, 314. 



Streptococcus varians, 306. 



Striatella, 327. 



Strodtmann, 263. 



Strophism, 309 ; definition of, 155. 



Strophotaxis, 309. 



Strychnine, influence of, on protoplasmic 

 movement, 298. 



Strychnos, 45, 46 ; secondary growth in 

 hook-tendrils of, 46 ; pressure due 

 to, 237. 



Style, autonomic movements of, 24. 



Stylidium adnatum, movements of gyno- 

 stemium of, 22, 82 ; influence of 

 gravity on, 148 ; of induction-shocks, 

 146. 



Stylonychia, contact-irritability in, 358 ; 

 galvanotaxis of, 361. 



Suchsland, 382, 384, 385, 386, 388. 



Sugar, changes in percentage of, during 

 curvature, 247 ; during shaking, 78, 

 248 ; chemotactic action of, 420, 421 ; 

 chemotropic action of, 181 ; influence 

 of, on fertilization, 182; repellent 

 action of, 352. 



Sugar-cane, changes of geotropic tone in, 

 164. 



Sulphuretted hydrogen, chemotactic action 

 of, 349. 



Summation of stimuli, 209, 210. 



Surface, influence of, on suspension, 263. 



Surface-tension, influence of, on amoeboid 

 movement, 277, 278, 279-83; of, 

 on chemo- and osmotropism, 230 ; 

 of electricity on, 278 ; of, on fusion, 

 34) 365 ; on ingestion and excre- 

 tion, 305 ; on movement, 300, 

 301 ; of chloroplastids, 331 ; on 

 phototropism, 229 ; on precipitation 

 membranes, 281 ; on pulsating 

 vacuoles, 294 ; on shape of proto- 

 plast, 299 ; of size of molecules on, 

 283 ; - - on streaming, 291 ; on 

 tactic movements, 312; physical move- 

 ments due to, 278 ; uses of, 404, 405. 



Surface-tension film, creeping of Diatoms 

 on, 272 ; of zoospores, 265. 



Swarm-cells, fusion of, 304. 



Sylvestre, 22. 



Sympodial stems, origin of, 23. 



Systole of vacuoles, 295. 



Systrophe, 333. 



Tactic responses, 308 ; nature of, 309 ; 



origin and uses of, 310, 311. 

 Tangl, 359. 



Tannin-tubes, as paths for stimuli, 95. 

 Taraxacum officinale, growth-movements 



of, 132 ; influence of light on leaves of, 



105 ; thermonasty and photonasty of, 



122. 



Tarchanoff, 382, 384, 385, 386. 

 Tassi, 144. 



Taxis, definition of, 154. 

 Taxus, 259, 260. 

 Tecoma, climbing of, 32. 



