Description from Flora of China
Herbs stoloniferous. Stems erect, simple or branched, 40-80 cm tall, basally glabrous, with spreading villous hairs above middle, hairs to 2.5 mm. Petiole 0.6-1.5 cm, villous; leaf blade ovate-lanceolate, 3.5-7 × 1-2.5 cm, adaxially sparsely puberulent, abaxially subglabrous, pubescent on veins, glandular, base truncate to subcordate, margin serrate, apex acute to acuminate. Spikes 1.5-4.5 cm, verticillasters close together and 2-flowered; bracts linear-lanceolate, pilose. Pedicel ca. 2 mm, glabrous. Calyx campanulate, glabrous, shiny glandular; teeth ciliate, 3.5-4 mm, triangular, subequal. Corolla reddish, ca. 1.1 cm, tube as long as calyx; limb well developed, middle lobe subcircular, anterior lateral lobes ovate, posterior lateral lobes acute. Ovary bullate, hairy. Nutlets unknown.
* Wet field margins, plateaus; 1200-1800 m. Gansu, Shaanxi