446 



INDEX 



Seeds, dispersal of, 151. 



Seignette, 368, 371, 373, 3$i> 



Seismonic irritability, absence of, in sta- 

 mens of Helianthus, 75 ; character of, 

 65, 66, 68, 140; influence of anaes- 

 thetics on, 144; uses of, 71. 



Seismonic stimuli, influence of, on excita- 

 bility, 70. 



Selaginella, 253 ; chemotaxis of sperms of, 

 345, 353 5 S.Martensii, 327. 



Sempervivum, orientation of chloroplastids 

 of, 329; S. alpinum, temperature of, 



379- 



Senebier, 372, 383. 



Senn, 293, 323, 332. 



Sensation, nature of, 5. 



Setaria italica, heliotropic seedling of, 197, 

 Fig. 43 ; S. viridis, heliotropism of, 193. 



Shadow figures, 333. 



Shibata, 303, 421. 



Shock reactions, 87, 307 ; nature of, 8 ; 

 influence of, on streaming, 357, 358. 



Sicyos angulatus, viscid secretion of, 48. 



Siebold, on cilia, 265 ; on movements of 

 Diatoms, 271. 



Sigesbeckia orientalis, influence of light on 

 daily movements of, 108-11 ; sleep- 

 movements of, 103. 



Silene nutans, 104. 



Silphhtm laciniatum, photic orientation of, 

 261. 



Simons, 21, 29. 



Sinapis alba, heliotropism of, 172, Fig. 37, 

 173 ; influence of absence of oxygen 

 on, 143; time of reaction of, 211. 



Singer, 183, 207. 



Slack, on streaming, 289. 



Sleep-movements, 102, 103, 104; uses of, 

 100, 101. 



Smithia sensitiva, seismonic irritability of, 

 80. 



Sodium chloride, chemotropic action of, 

 181. 



Soja, 257 ; S. hispida, 185. 



Sokolowa, 19. 



Solanum, heliotropism of, 194 ; S. dulca- 

 mara, twining of, 38 ; S. jasminoides, 

 44; twining petiole of, 45, Fig. 13; 

 thickening of, 46, 47; S. lyco- 

 persicum, 314. 



Somatotropism, 189-92. 



Sonntag, on red and white wood, 415. 



Sordariafimiseda, heliotropism of, 173. 



Sorghum vulgar e, heliotropism of, 193. 



Sorokin, 173, 175, 318. 



Sosnowsky, 337. 



Sound-waves, influence of, 79. 



Sowinsky, 381. 



Spadix, production of heat by, 370, 371, 

 374, Fig. 67 ; use of, 368. 



Spalding, on traumatropism, 185, 186, 187. 



Sparganium, 204 ; plagiotropism of, 146, 

 147 ; of S. ramosum, 164. 



Sparmannia, movement of stamens of, 82 ; 

 S. africana, 92; sleep-movements of 

 stamens of, 103. 



Spergula salina, 115. 



Sperms, discriminatory sense of, 214. 



Sphaeria scirpi, dispersal of, 150, Fig. 34. 



Sphaerobolus stellatus, 148. 



Sphaeroplea, 325. 



Sphagnum, chemotaxis of sperms of, 345. 



Spherogenic activity, 275. 



Spmacea, movements of stamens of, 147. 



Spiraea salicifolia, 259. 



Spirillum, aerotaxis of, 365 ; chemotaxis 

 of, 344, Fig. 62, 346, 350; cilia of, 

 264; locomotion of, 266; S. Fmkler- 

 Prior, 340, 346 ; S. serpens, 346, 347 ; 

 S. tenue, 421 ; S. undula, 346, 347, 

 35 r , 35 2 ; chemotaxis of, 346; osmo- 

 taxis of, 353, 354; S. -volutans, 346, 



351- 



Spirogyra, 4, 202, 262, 274, 300, 303; 

 autonomic movements of, 20; coiling 

 f> 38 ; growth-movements of, 19 ; in- 

 fluence of centrifugal force on, 335 ; 

 persistence of curvature in, 31 ; re- 

 traction of, 75 ; streaming in, 285. 



Spirostomum ambigimm, galvanotaxis of, 

 310,361; S.teres,^. 



Sporangia, dehiscence of, 150, 151, 152; 

 influence of light on, 153. 



Sporangiophores, discriminatory power of, 

 214; autotropism of, 189; electro- 

 tropism of, 188 ; geotropism of, 165 ; 

 heliotropism of, 173, 195 ; hydro- 

 tropism of, 183. 



Spores, dispersal of, 149, 150, 151, 416; 

 influence of light on, 153. 



Sporodinia, 183 ; S. grandis, 209. 



Sporophores, curvature of, when split, 241 ; 

 rise of temperature in, 366. 



Sprengel, 100. 



S tacky s sylvatica, 250. 



Stahl, 22, 30, 102, 106, 174, 206, 261, 274, 

 337, 344, 348, 349, 35- 352; on auto- 

 nomic movements, 25; on chemo- 

 tropism, 180 ; on orientation of chloro- 

 plastids, 327. 328, 329, 330, 331, 332, 

 333 ; on phototaxis, 320, 321, 322, 324, 

 325, 326; on protoplasmic streaming, 

 355 ; on reversal of heliotropism, 171 ; 

 on rheotaxis, 356 ; on sleep-movements, 

 103, 126; uses of, 100; on thermo- 

 taxis, 317; on tropism, 164. 



Stamens, dehiscence of, 147, 148 ; irritable, 

 24, 8 1 ; influence of darkness on 

 movements of, 30 ; mechanism of, 72, 

 73; of Ruta, 23, Fig. 5. 



Stammeroff, 105. 



Stange, 354. 



Stanhopea oculata, opening of flower of, 

 148. 



Starch-grains, influence of gravity on, 334, 

 336 ; of centrifugal force, 335 ; 



