TWINERS AND CLIMBERS. 195 



the Chili nettle (Loasa aurantiaca), a common green- 

 house climber, out of eighteen plants eight revolved 

 in opposition to the sun, five followed the course of 



Fig. 23. — Bitter-Sweet {Solatium dulcamara). 



the sun, and four turned first in one direction and 

 then in the other. 



During the experiments on twining plants several 



o 



