TEXDUTL-BEAEEHS. 70 



revolved ; in the latter plant, Dutroeliet* saw the movement of 

 tlie tendril reversed ; but whether the internodes as well as the 

 tendrils revolve in these several species I did not observe. In 

 Angtiria Warscemczii^ however, the internodes, though thick and 

 stiff, do revolve : in this plant the lower surface of the tendril, 

 some time after clasping a stick, produces a coarsely cellular layer 

 or cushion, fitting the wood, like that formed by the tendril of the 

 Hanhurya ; but it was not in the least adhesive. In Zanonia 

 Indica^ which belongs to a different tribe of the family, both the 

 forked tendrils and the internodes revolved, in periods between 

 2 h. 8m. and 3 h. 35 m., moving against the sun. 



YiTACEiE. — In this family and in the two following, namely, 



the Sapindacea? and Passifloraceae, the tendrils are modified flower- 

 peduncles ; so that they are axial in their nature. In this respect 

 they differ from those of all the first described families, but 

 perhaps not from those of the Cucurbitacese. The homological 



nature, however, of a tendril* seems to make no difference in its 

 action. 



Vitis vinifera. — The tendril is thick and of great size; one from 



Fig. 9. 



Tendril of the Vine. 



A. Peduncle of tendriL C- Shorter branch. 



B, Longer branch, with a scale at ita base. D. Petiole of opposite leaf. 



a vine not growing vigorously out of doors, measured 16 inches 

 in length. It consists of a peduncle (A), bearing two branches 



* Comntcs Bendus. torn, xvii. p. 1005. 



