Shrubs 1-2 m tall. Stems subterete, striate, densely puberulent, much branched; branches slender. Petiole 1-2 cm, densely puberulent; leaf blade ovate to ovate-triangular, 2.5-4 × 1.8-2.5 cm, villous-hispid, base rounded, margin sparsely incised-serrate, occasionally double serrate, apex acute. Cymes 1(-3)-flowered, densely puberulent; peduncle 1-1.4 cm; bracteoles linear-lanceolate, ca. 1 × 1.5 mm, puberulent abaxially. Pedicel ca. 2 mm. Calyx campanulate, ca. 1.8 cm, puberulent outside, glabrous inside, tube ca. 1.5 cm; teeth 5, triangular, ca. 5 mm, apex acuminate. Corolla ca. 3 cm, densely pubescent except at base outside, glabrous inside; tube ca. 2.6 cm, much exserted, dilated at throat; upper lip ovate, ca. 4 mm; middle lobe of lower lip obcordate, emarginate. Filaments puberulent. Style equally 2-cleft. Immature nutlets dark brown, striate. Fl. Oct.
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