A COTTON PLANT IN ITS DAY POSITION UNDER DIRECT LIGHT 



This is the same plant as the one shown on the opposite page. The leaves are constantly 

 adjusting their positions according to the directness of the sun's rays The distal pulvinus located 

 in the end of the petiole raises or lowers individual lobes of the leaf-blade, and the basal pulvinus 

 changes the position of the whole leaf. "The leaves are in a different position in the afternoon than 

 in the morning, the blades facing east in the forenoon and west in the afternoon. (big. 9.; 



