Annual or perennial herbs with hairy parts and alternate leaves. Inflorescence initially scorpioid, later racemose. Flowers ebracteate, blue or white. Calyx barely enlarged in fruit. Corolla hypocrateriform, 5-lobed, with tube smaller than the calyx; lobes spreading. Throat scales present. Stamens 5, included. Nutlets 4, usually ovoid and compressed, smooth, shiny.