Description from Flora of China
Herbs perennial, erect. Stems to 50 cm, rarely branched, red-purple, base glabrous, apex puberulent. Petiole 1-4 cm; leaf blade ovate-lanceolate to lanceolate, 8-16 × 3-5 cm, adaxially hirsute, abaxially gray-green, finely puberulent, base cuneate-decurrent into petiole, margin coarsely dentate-serrate, apex long acuminate. Verticillasters widely spaced, 10- or more flowered. Calyx tubular, ca. 9.5 mm, puberulent; tube ca. 7 mm, conspicuously 10-veined; teeth narrowly triangular, ca. 2.3 × 1.8 mm, apex acute. Corolla gray-yellow, tubular, ca. 1.8 cm, densely villous outside, pilose annulate near base inside; tube ca. 1.2 cm; upper lip oblong, ca. 6 × 3.5 mm, erect, margin entire; lower lip broadly obovate, ca. 6 × 7 mm; middle lobe obcordate, ca. 3 × 2.6 mm, emarginate; lateral lobes broadly elliptic, ca. 2.2 × 1.9 mm, margin entire. Nutlets black-brown, ca. 2 × 0.9 mm, base cuneate, apex truncate. Fl. Jun.
* Shady slopes. Zhejiang.