Description from Flora of China
Herbs erect. Stems ca. 1 m tall, much branched toward apex, densely retrorse pubescent. Petiole 0.5-4 cm, densely appressed pubescent; leaf blade ovate-lanceolate, 3.5-9 × 1.5-5.5 cm, thin papery, adaxially sparsely minutely hispid, abaxially densely pubescent especially on veins and margin, base cuneate to subrounded, attenuate, margin crenate-serrate, apex long acuminate; lateral veins 3 or 4 pairs. Verticillasters 6-12-flowered; bracteoles subulate, 2-5 mm, densely pubescent. Pedicel very short to obsolete. Calyx ca. 1 cm, appressed pubescent mainly on veins outside, conspicuously 5-veined; teeth shorter than tube, thin papery, ovate, apex acuminate, with a short spine. Corolla dark red, white spotted on throat, to 2 cm, densely pubescent outside, scaly inside; tube slender, straight; upper lip narrowly elliptic, ca. 5 mm, entire; lower lip as long as upper lip, middle lobe obcordate, lateral lobes ovate. Fl. Aug.
* Broad-leaved forests, riverbanks; 1200-1400 m. Hunan.