ON Drosera rotundifolia 



15 



approximately the same as before, 22 hours and 45 minutes. 

 At the end of the reaction the tentacle measured 3.74 mm. It had 

 increased 0.37 mm. in length. A control, that like this tentacle 



Table IV 



* Controls well bent. 



had made one previous inflexion, measured 2.85 mm. before and 

 after the experiment. Another that had never reacted measured 

 similarly 2.3 mm. 



This tentacle was allowed to rest over another day and it was 

 stimulated for the third time. At this time it measured 3.74 mm. 



Fig. 9. A graph representing the second reaction of the tentacle shown in 

 Figs. 1-4; drawn according to data in Table IV, and on the same scale as Fig. 4. 



