BOW SOME PLANTS GET UP IN TEE WORLD 399 



a mark along one side of it, from base to tip, 

 with indelible ink, and observe if the line be- 



FiG. 419. 

 Tendrils of cassabanana, a meloD like plant. 



comes twisted, or if it is now seen on the con- 

 cave side of the tendril and then on the con- 

 vex side. 



504. The tendril finally strikes a support. 

 What then? "It coils; but if it coils much, why 

 does it not twist in two, since both base and 

 tip are fixed? Study Fig. 419. At a the branches 

 of the tendril are searching for a support. At h 



