| Noun | 1. | genus Diapensia - type genus of Diapensiaceae dilleniid dicot genus - genus of more or less advanced dicotyledonous trees and shrubs and herbs diapensia family, Diapensiaceae, family Diapensiaceae - north temperate low evergreen plants; in some classifications placed in its own order Diapensiales diapensia - any boreal low-growing evergreen plant of the genus Diapensia |