Herbs, perennials, to 1 m, rootstocks creeping, pubescent with curved hairs or with spreading ? glandular hairs. Leaves opposite, ovate or oblong-ovate, acute, crenate-serrate, rounded or subtruncate at the base, to 7 cm long and 3.5 cm wide, the upper surfaces pubescent or glabrous, the lower paler with soft curved hairs, or ? glabrous, sometimes with longer straight hairs on the veins; petioles ca 2-2.5 cm long. Inflorescences verticillasters, 1-flowered, arranged as a terminal spike, to ca 17 cm long, the bract leaflike, lanceolate, ca 4-6 mm long, pubescent beneath. Flowers with pedicels ca 1 mm long; calyx weakly bilabiate, 5-7 mm long, the upper lip 2-toothed, the lower lip 3-toothed, the teeth deltoid, pubescent, inflated and ? saccate at maturity; corolla tubular, exserted or equal to the calyx, the upper small and inconspicuous, the lower ca 4 mm long; stamens 4, exserted, the anthers 0.5 mm long. Nutlets wedge-shaped, glabrous, wrinkled, 2-2.5 mm long.
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