Herbs, or sometimes shrubby. Stems and branches softly pubescent or woolly. Flowers in axillary whorls or forming a loose terminal spicate or paniculate inflorescence. Calyx ovoid or tubular-campanulate, straight, 10-nerved, almost equally 5-toothed. Corolla tube short, annulate within; upper lip short, entire and erect; lower lip 3-lobed, broad and patent, midlobe retuse or notched. Stamens exserted, in 2 pairs, those of the lower pair often ± longer; anthers of the upper pair sterile, of the lower pair only one cell fertile. Disk equal-sided. Style subequally 2-fid. Nutlets smooth, flattened, bluntly angular, and with rather prominent scar on the ventral surface.