Cuar. IV. VITACES. 137 
Vitis vinifera —The tendril is thick and of great 
length; one from a vine growing out of doors and not 
vigorously, was 16 inches long. It consists of a 
peduncle (A), bearing two branches which diverge 
equally from it. One of the branches (B) has a 
scale at its base; it is always, as far as I have seen, 
longer than the other and often bifurcates. The 
branches when rubbed become curved, and _ subse- 
Fig. 9. 
Tendril of the Vine. 
A. Peduncle of tendril. C. Shorter branch. 
B, Longer branch, with a scule at its base. D. Petiole of the opposite leaf. 
quently straighten themselves. After a tendril has 
clasped any object with its extremity, it contracts 
spirally; but this does not occur (Palm, p. 56) when 
no object has been seized. The tendrils move spon- 
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