764 PLANT RESPONSE 



287. Negative response of stem of Mimosa to strong vertical light . . 625 

 2S8. Positive response of terminal leaflet of DesDiodiiitii, stimulated alter- 

 nately from above and below 586, 5S7 



289. Orientating action of light ........ 587 



290. Positive response of Eiythrina indica (diurnal sleep movement) . 629 



291. Positive response of 7?tf(5?V//a (diurnal sleep movement) . . . 629 



292. Positive response of CiitoHa teriiatea (diurnal sleep movement) . . 629 



293. Neutral response of Desmodiitni leaflet under long-continued stimu- 



lation 604 



294. Positive response of Mimosa, when stimulated alternately from above 



and below, by light of feeble intensity . . . . . . 631 



295. Transition of response in Mimosa, from positive, through neutral, to 



negative, under continuous light from above .... 632 



296. Negative response of leaflet of Biophytum (diurnal sleep move- 



ment) 634 



297. Negative response of leaflet of C>.ra//.s- (diurnal movement) . . 633 



298. Multiple heliotropic response . . . . . 303, 584, 604, 634 



299. Multiple merging into continuous heliotropic response . . . 586 

 303. Localisation of heliotropic sensibility in pulvinus . . . 588, 650 



301. Lamina not perceptive organ to stimulus of light . ... 651 



302. Absence of specific dia-heliotropic tendency in leaves . . . 649 



In ordinary leaves : 



303. Positive response of leaf of Mangifera indica 653 



304. Negative response of ^;-/'i?(rtr/// J- ....... 653 



305. Torsional response to lateral stimulation of terminal leaflet of 



Desmodiitm . . . . . . . . . ..657 



See also Torsiona/ response 0/ dorsi-z'e/i/ra/ organs . . . .661 



306. Limits of flexibility in various leaves 647 



Nyctitropic movement : 



307. Diurnal movement of plagiotropic stem ...... 679 



308. Diurnal movement of leaf of Biophytitm . . . . . . 680 



309. Nyctitropic movement of Mimosa leaf, due to cumulative heliotropic 



action 678 



310. Nyctitropic movement of primary petiole of J//w^jra . . . . 681 



311. Impressed heliotropic periodicity in Sunflower .... 685 



Heliotropic action on autonomous response : 



312. Initiation of autonomous response by light in /Jfj-w^rt'/z/w . . . 690 



313. Changes of amplitude in autonomous pulsation of Z>^5w <?<//«;// . 691 



314. Periodic reversals of relative rapidities of up and down beats in 



Desmodiiim . . . . . . . . . . . 692 



315. Modification of autonomous torsion ...... 669 



See also Photolaxis .......... 696 



