| Noun | 1. | genus Gesneria - large genus of tropical American herbs having showy tubular flowers asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs family Gesneriaceae, gesneria family, Gesneriaceae - large family of tropical herbs or shrubs or lianas; in some classification systems placed in the order Scrophulariales gesneria - any plant of the genus Gesneria |