Herbs perennial. Leaves dentate, reduced upward, bractlike. Verticillasters ± headlike, in panicles; peduncle sometimes present; bracts linear to needlelike, to as long as calyx. Calyx tubular, 13-veined, sometimes constricted at middle, swollen on 1 side at base, straight or slightly curved, throat sparsely hairy, limb 2-lipped; upper lip 3-toothed, teeth ciliate, apex mucronate; lower lip longer, 2-toothed. Corolla purple-red, reddish, or white, 2-lipped; tube exserted, gradually dilated upward to throat, with 2 rows of hairs, puberulent; upper lip straight, apex emarginate; lower lip 3-lobed, lateral lobes entire; middle lobe larger, emarginate or entire. Stamens 4, anterior 2 longer than posterior 2, reaching upper corolla lip, included or slightly exserted, posterior stamens sometimes rudimentary; anther cells 2, divaricate, ± obliquely inserted on dilated connectives. Style apex unequally 2-cleft, anterior lobe lanceolate, posterior lobe indistinct; ovary glabrous. Nutlets ovoid or subglobose, less than 1 mm in diam., glabrous, areolae small, basal.
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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.
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