Description from Flora of China
Annuals, to 20 cm, creeping, sparsely branched. Rhizomes slender. Stems and branches quadrangular, striate, densely patent hirsute. Petiole 3-5 mm, hirsute; leaf blade suborbicular, rarely broadly ovate to suboblong, 0.8-1.5 X 0.8-1.5 cm, densely patent hirsute, base usually truncate, margin triangular serrate, apex rounded; veins abaxially conspicuous. Peduncle patent hirsute. Inflorescences axillary, (1 or)2(-4)-flowered; bracts linear-lanceolate to narrowly ovate. Pedicel 1.5-1.9 cm, patent hirsute. Calyx 6-8 mm, lobed to base; lobes linear-lanceolate to linear, outside patent hirsute, margin patently hirsute, veins conspicuous. Corolla pink to bluish, ca. 1.2 cm; tube ca. 8 mm; lower lip 3-lobed, longer than upper lip; upper lip 2-lobed. Filaments of anterior stamens with a clavate appendage. Capsule fusiform-ovoid, shorter than persistent calyx, ribbed. Seeds yellow-brown, ovoid-globose.
* Mixed forests, trailsides; ca. 600 m. Jiangxi (Anyuan Xian, Huichang Xian).