Description from Flora of China
Subshrubs 30-60 cm tall. Stems erect, terete, densely spreading white hirsute. Petiole 1.5-4 mm; leaf blade ovate, 1.5-3.8 × 0.8-2.5 cm, papery, yellowish hirtellous, occasionally sparsely yellow glandular, adaxially slightly wrinkled, base broadly cuneate to roundish, margin shallowly crenate to entire, apex acute to subobtuse. Racemes poorly defined, terminal, leafy, 7-27 cm. Pedicel to 5 mm, densely, spreading, white hirsute. Calyx 2-3 mm, glandular hirsute outside, to 4 mm in fruit; scutellum ca. 3 mm, subcircular, ca. 5 × 5 mm, reflexed, conspicuously netted in fruit. Corolla purple, 1.5-1.7 cm, finely glandular pilose outside, glabrous inside; tube to ca. 8 mm, suberect, base slightly saccate, throat ca. 3 mm wide; upper lip ca. 4.5 mm; middle lobe of lower lip subcircular, ca. 6.5 mm in diam., revolute, apex emarginate; lateral lobes adnate to upper lip, ca. 2.5 × 1 mm, revolute. Nutlets black, ellipsoid, ca. 1.25 × 0.75 mm, adaxially appressed, white puberulent, white umbonate near base.
* Sunny roadsides, savannalike slopes; 600-1600 m. Yunnan.