| Noun | 1. | genus Kirkia - small genus of tropical South African trees and shrubs rosid dicot genus - a genus of dicotyledonous plants family Simaroubaceae, quassia family, Simaroubaceae - chiefly tropical trees and shrubs with bitter bark having dry usually one-seeded winged fruit Kirkia wilmsii, pepper tree - small African deciduous tree with spreading crown having leaves clustered toward ends of branches and clusters of creamy flowers resembling lilacs |