Erythranthe

Perennial or annual herbs, conspicuously or obscurely gland-dotted. Leaves opposite or whorled, simple, sessile or petiolate, often joined across at nodes. Inflorescences a single flower or of racemes with flowers single in the axils of leaf-like bracts; bracteoles absent. Calyx-tube 5-angled, shortly 5-toothed; corolla 5-lobed, more or less rotate or 2-lipped, tube symmetrical at base, neither swollen nor spurred, upper lip 2-lobed, lower 3-lobed, longer, with a palate; stamens 4, in pairs of unequal length, filaments not spurred, anthers of each pair joined, with 2 confluent but divergent locules, staminodes absent; stigma with 2 broad equal flaps, receptive on the inner surface and irritable, closing together when touched. Capsule loculicidal, included in enlarged calyx; septa united to the 2 valves and to the central column; seeds many, not winged.