INDEX. 



591 



TRITICUM. 



Triticum vulgare, sensitiveness of 



tips of radicle to moist air, 181 

 Tropce.olum majus (?), sensitiveness 



of apex of radicle to contact, 167 



, circumnutation of stem, 204 



, influence of illumination on 



nyctitropic movements, 838-340, 



344 

 , heliotropic movement and 



circumnutation of epicotyl of a 



young seedling, 428, 429 

 , of an old internode towards a 



lateral light, 430 

 , stems of very young plants 



highly heliotropic, of old plants 



slightly apheliotropic, 453 



, effect of lateral light, 484 



minus (?), circumnutation of 



buried and arched epicotyl, 27 



Ulex, or gorse, first-formed leaf of, 

 415 



Uraria lagopus, vertical sinking of 

 leaflets at night, 365 



Vaucher, on the burying of the 

 flower-heads of Tri folium sub- 

 terraneurn, 513; on the protec- 

 tion of seeds, 517 



Verbena melindres (?), circumnuta- 

 tion of stem, 210 



, apogeotropic movement of 



stem, 495 



V. 



Vicia faba, circumnutation of ra- 

 dicle, 29, 30 



, of epicotyl, 31-33 



, curvature of hypocotyl, 92 



, sensitiveness of apex of ra- 

 dicle, 132-134 



, of the tips of secondary ra- 

 dicles, 154 



, of the primary radicle above 



the apex, 155-158 



, various experiments, 135-143 



, summary of results, 143-151 



, power of an irritant on, com- 



26 



WILSON. 



pared with that of geotropism, 

 151-154 



Vicia faba, circumnutation of leaves, 

 233-235 



, circumnutation of terminal 



leaflet, 235 



, effect of apogeotropism, 444 



, effect of amputating the tips 



of radicles, 523 



, regeneration of tips, 526 



, short exposure to geotropic 



action, 527 



, effects of amputating the tips 



obliquely, 528 



, of cauterising the tips, 529 



, of grease on the tips, 534 



Vines, Mr., on cell growth, 3 

 Vries, De, on turgescence, 2 ; on 

 epinasty and hyponasty, 6, 267, 

 268 ; the protection of hypo- 

 cotyls during winter, 557 ; stolons 

 apheliotropic, 108 ; the nycti- 

 tropic movement of leaves, 283 ; 

 the position of leaves influenced 

 by epinasty, their own weight and 

 apogeotropism, 440 ; apogeotro- 

 pism in pt-tioles and midribs, 443 ; 

 the stolons of strawberries, 451 ; 

 the joints or pulvini of the Gra- 

 minese, 502 



W. 



Watering, effect of, on Forlieria 

 hygrometrica, 336-338 



Wells, Essay on Dew,' 284, n. 



Wiesner, Prof., on the circumnuta- 

 tion of the hypocotyl, 99, 100 ; 

 on the hooked tip of climbing 

 stems, 272 ; observations on the 

 effect of bright sunshine on 

 chlorophyll in leaves, 446; the 

 effects of an intermittent light, 

 457 ; on aerial roots, 486 ; on 

 special adaptations, 490 



Wigandia, movement of leaves, 248 



Williamson, Prof, on leaves of 

 Drosera Capensis, 414 



Wilson, Mr. A. S., on the move- 

 ments of Swedish turnip leaves. 

 230, 298 



