Herbs, large somewhat woody at the base to tree-like, up to 3 m tall, fre-quently with stinging hairs. Leaves very large, subentire. Flowers in regularly arranged cincinni; calyx usually divided to the base; corolla large, purplish, in-fundibuliform-campanulate or shortly hypocrateriform; stamens somewhat ex-serted, partly adnate with the corolla-tube, the filament barbed for the most part; styles 2, elongate, the stigma capitate-clavate. Capsule loculicidally and septicid-ally dehiscent; seeds small, brown, winged, the embryo barely conspicuous.
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