Description from Flora of China
Herbs perennial, rhizomatous. Stems 30-80 cm tall, erect, subterete and subglabrous basally, densely white hirtellous and much branched apically. Petiole 0.5-1.5 cm; leaf blade cordate, 1-2.5 × 1-3 cm, herbaceous to ± papery, sparsely strigose, densely so along veins, abaxially with red glands, base cordate, margin 4-7-crenate, apex acute to obtuse. Racemes terminal, 6-12 cm; bracts narrowly ovate, 2.5-4 mm, lower ones to 1.5 cm. Pedicel to 4 mm, densely glandular white hirtellous. Calyx ca. 3 mm, ca. 4 mm in fruit, white hirtellous outside; scutellum ca. 1.5 mm, ca. 3.5 mm, netted in fruit. Corolla purple-blue, ca. 1.8 cm, sparsely puberulent outside, glabrous inside; tube base slightly saccate geniculate, throat to 4 mm wide; middle lobe of lower lip subcircular, base abruptly constricted, apex emarginate, spotted on middle; lateral lobes ovate. Nutlets unknown. Fl. Jun.
* Forests; 600-2100 m. Yunnan (Fengqing Xian).