Description from Flora of China
Herbs rhizomatous. Stems to 20 cm tall, ascending-erect, densely spreading white pilose, branched, internodes much longer than leaves. Petiole 0.2-2.5 cm; leaf blade narrowly triangular-ovate to oblong, 1.3-3 × 0.8-2.2 cm, membranous, sparsely pilose, base shallowly cordate, margin undulate-crenate, apex acute. Racemes terminal, 3.5-8 cm; bracts sessile, elliptic, all but lower bracts minute, 1.5-5 mm, membranous, margin entire, finely pilose. Pedicel ca. 2 mm, glandular puberulent. Calyx ca. 2 mm, to 3 mm in fruit, glandular puberulent; scutellum ca. 0.75 mm, to 2 mm in fruit. Corolla purple, ca. 8 mm, pubescent outside, glabrous inside; tube ca. 6.5 mm, base saccate, throat to 3 mm wide; upper lip straight; middle lobe of lower lip constricted at base, apex emarginate; lateral lobes ovate, ca. 1.5 mm wide. Nutlets unknown.
* Hills; ca. 300 m. Hunan, Jiangxi, Zhejiang.