130 TENDRILS [CH. XVI 



leaf, seeing that the Vine and Ampelopsis have alternate 

 leaves, as we observe from comparison. Still better 

 evidence, however, is afforded by the existence of small 

 scale-like leaves and even buds and flowers on such 

 tendrils, and we are driven to conclude and the con- 

 clusion is amply borne out by the study of development 

 and comparison with allied forms that the tendrils of 

 the Vine and Virginian Creeper are branch-organs i.e. 

 they are branch- tendrils in the same sense and for the 

 same reasons that the spines in the Blackthorn, Haw- 

 thorn, &c., are branch-thorns. 



