Erect or ascending perennial herbs. Stems with eglandular often retrorse hairs, leafy. Leaves ovate, crenulate to subentire, shortly petiolate. Inflorescence of distant few-to many-flowered verticillasters borne in the axils of the upper leaves. Bracts linear. Flowers white, pink or purplish, shortly pedicellate. Calyx bilabiate, curved, 13-veined; throat pilose or not; teeth prominent, long-ciliate ± upward curved, lower longer. Corolla bilabiate; upper lip short straight emarginate, pilose; lower lip 3-lobed median entire or emarginate; tube not annulate within. Stamens 4 included under upper lip of corolla, didynamous; thecae 2-locular, glabrous, divergent, with a swollen connective. Stylar branches markedly unequal. Nutlets ovoid to obovoid, smooth, scarcely trigonous, apically rounded.