764 PLANT RESPONSE 



PAGE 



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



288. Positive response of terminal leaflet of Desmodium, stimulated alter- 



nately from above and below ...... 586, 587 



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



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



291. Positive response of Robinia (diurnal sleep movement) . . . 629 



292. Positive response of Cliloria ternatea (diurnal sleep movement) . . 629 



293. Neutral response of Desmodium 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 Oxalis (diurnal movement) . . 633 



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



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



300. 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 Artocarpus . . - . . . '653 



305. Torsional response to lateral stimulation of terminal leaflet of 



Desmodium . . . . . . . . . 657 



See also Torsional response of dor si-ventral 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 Biophytum . . . . . . 680 



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



action ........... 678 



310. Nyctitropic movement of primary petiole of Mimosa . . . . 681 



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



Heliotropic action on autonomous response : 



312. Initiation of autonomous response by light in Desmodium . . . 690 



313. Changes of amplitude in autonomous pulsation of Desmodium . 691 



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



Desmodium. . . . . . . . . . . 692 



315. Modification of autonomous torsion 669 



See also Phototaxis .......... 696 



