Shrubs 1-2 m tall. Branches slender, densely glandular pubescent. Petiole 2.5-4 cm, sparsely puberulent, densely glandular pubescent; leaf blade ovate to ovate-lanceolate, 6-8 × 3-4 cm, sparsely puberulent, adaxially ciliate along veins, abaxially glabrous or subglabrous, base shallowly cordate, margin crenate-serrate, apex acuminate. Cymes glandular pubescent, usually 3-flowered; peduncle to 2.5 cm; bracts linear, 5-10 mm, pubescent. Pedicel 2-3 mm. Calyx 1-1.5 mm, sparsely pubescent, glandular pubescent at base; teeth 5, triangular, 3-4 mm, apex mucronate-acuminate. Corolla dark purple-red, ca. 3 × 1 cm at throat, apex puberulent outside, subglabrous inside; upper lip ca. 3 mm, slightly emarginate; middle lobe of lower lip narrowly elliptic, more than 1 cm, lateral lobes circular. Filaments glabrous. Style glabrous, 2-cleft (specimens not seen).
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