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

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)

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

(01 Mar 1998)