Perennial herbs with erect to rather straggling stems. Lvs simple, usually toothed. Verticels in dense, many-flowered, terminal and axillary whorls. Bracts resembling foliage lvs; bracteoles subulate, prominent. Calyx tubular, curved, not gibbous at base, 13-nerved, 2-lipped. Corolla 2-lipped, hairy outside; upper lip emarginate; lower lip 3-lobed with the middle lobe largest; tube straight. Stamens included, convergent below upper lip. Style gynobasic, its branches unequal, the upper subulate, the lower longer and wider. Nutlets subglobose, smooth.