wampee UK /wɒmˈpiː/US /wɑmˈpiː/ noun3 •A tree, Clausena lansium, native to Southern China and Indochina. •The fruit of this tree. •Pontederia species, especially Pontederia cordata.[…] bulrushes, nut grass, corn grass, switch grass, and the wampees (Pontederia and Peltandra). — 1914 formswampees