Herbs erect. Stem solitary, 30-60 cm, densely retrorse white pilose, leafless toward base, unbranched. Petiole narrowly winged; leaf blade ovate, 4-9 × 2.5-4.5 cm, adaxially dark green, sparsely white pubescent, densely so on veins, abaxially gray, densely retrorse pilose especially on veins, golden glandular, base rounded or cuneate-attenuate into petiole, margin irregularly crenate-serrate, apex acute to acuminate. Verticillasters 2-8-flowered; bracteoles minute, subulate, early deciduous. Pedicel 1-2 mm. Calyx obconical, 6-7 mm, densely fine strigose, glabrous inside, conspicuously 5-veined; teeth triangular, subulate to acute, incurved. Corolla white or tinged purple, ca. 1.4 cm, strigose-villous, glandular, villous annulate inside; tube ca. 6 mm, throat slightly dilated; upper lip elliptic, entire, erect, concave; lower lip larger, middle lobe trapeziform, emarginate. Ovary apex villous. Fl. Jul-Oct.
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