Herbs. Stem solitary, erect, 30-70 cm, grooves purple or purple-red, densely retrorse fine bristly-puberulent. Petiole 0.5-2 cm, longest and narrowly winged on mid stem leaves; leaf blade elliptic to oblong-ovate, 8-15 × 4-6(-8) cm, adaxially sparsely fine bristly-puberulent, abaxially finely bristly-puberulent mainly along veins, sometimes indistinctly yellowish glandular, base cuneate-decurrent, margin crenate-serrate, apex acute. Verticillasters (2-)4-14-flowered, subglobose, 1.5-2 cm in diam. before anthesis; bracteoles linear, to 4 × 0.5 mm. Pedicel 1-2 mm. Calyx tubular, ca. 7 mm, sparsely fine bristly, inconspicuously yellowish glandular; teeth finely bristly-puberulent on inside, triangular, 2.5-3 mm, ca. 1.5 mm wide, apex bristlelike-acuminate, reflexed. Corolla white, ca. 1.5 cm; tube straight, cylindric or throat slightly dilated, sparsely pilose, pilose annulate inside; upper lip oblong, ca. 5 mm, concave, entire, densely pilose; middle lobe of lower lip trapeziform, less than 3 mm wide, margin undulate, glabrous except for densely pilose center; lateral lobes ovate, ca. 2 mm wide, densely pilose outside. Ovary glabrous. Nutlets unknown. Fl. Jun.
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