Webster's Revised Unabridged Dictionary · 1913

Wampee

Wampee , noun

(a)
(Botany) A tree (Cookia punctata) of the Orange family, growing in China and the East Indies; also, its fruit, which is about the size of a large grape, and has a hard rind and a peculiar flavor.
(b)
(Botany) The pickerel weed. [Southern United States]