Herbs or shrubs. Flowers rather large, densely crowded in axillary verticillasters. Bracts slender. Calyx funnel-shaped, 8-10-nerved, 8-10-toothed; mouth slightly oblique, uppermost tooth longest. Corolla as long as or longer than the calyx, 2-lipped; upper lip long, concave, villous, lower lip 3-lobed. Stamens 4, ascending under upper lip of corolla; lower pair longer; anther-cells divaricate, confluent. Disk equal. Style subulate, with the upper stigmatic segment reduced to a tiny tooth. Nuts oblong or obovoid, glabrous.
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