Perennial, rhizomatous herbs with large lvs clothed in appressed hairs; basal lvs long-petiolate; cauline lvs short-petiolate to sessile. Infl. usually a terminal panicle of ebracteate cymes, more rarely reduced to a single cyme. Calyx lobed nearly to base, accrescent. Corolla rotate, small, blue or violet; tube campanulate; lobes ovate-orbicular; scales 5, ciliate, ± closing throat. Stamens inserted at middle of tube, included. Style included. Nutlets oblong-obovoid, erect, rugose or ribbed with thickened collar at base.
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