What is "berchemia volubilus"

Supple-jack \Sup"ple-jack`\, n. (Bot.)

1. A climbing shrub ( Berchemia volubilus) of the Southern United States, having a tough and pliable stem.

2. A somewhat similar tropical American plant ( Paullinia Curassavica); also, a walking stick made from its stem.

   He was in form and spirit like a supple-jack, . . . yielding, but tough; though he bent, he never broke.
   --W. Irving.

   Note: This name is given to various plants of similar habit in different British colonies.