Description from Flora of China
Herbs perennial, stoloniferous, ascending. Stems ca. 60 cm tall, unbranched or short branched, with dense, purple, hooked hairs. Petiole 0.5-2 cm; leaf blade ovate-oblong, 3-6 × 1.5-2.6 cm, adaxially puberulent or subglabrous, abaxially subglabrous except for pubescent veins, base cuneate to broadly cuneate-decurrent, margin double crenate, apex obtuse to acute. Spikes on short branches, 3-15 cm; verticillasters secund, 2-flowered; bracts subsessile, ovate, margin entire. Pedicel 2-2.5 mm, to 4 mm in fruit, densely pubescent. Calyx campanulate, ca. 5 mm, pubescent outside, pilose annulate at throat; middle tooth of upper lip subcircular, apex acute, ca. 2 mm wide, lateral teeth triangular; lower lip teeth subulate, ca. 2.5 mm. Corolla white, to 2 cm, tube ca. 8 × 1.2 mm, pilose outside; middle lobe rhombic-oblate, ca. 4.5 × 5 mm, apex acute, constricted into claw at base; posterior lateral lobes linear-lanceolate, apically ciliate. Ovary bullate, hairy. Nutlets yellow-brown, obovoid, ca. 1.1 mm, slightly netted. Fl. Jul-Aug.
* Hilly forests; ca. 1200 m. Guizhou, Sichuan, Yunnan.