Herbs perennial. Stems erect or ascending, much branched, 60-70 cm tall, covered with small hooked hairs. Petiole 3-9 mm, strigose; leaf blade ovate to obovate, 1.2-3.8 × 0.8-2.2 cm, adaxially strigose, abaxially hispid, base cuneate-decurrent, margin undulate-crenate to crenate, apex rounded to obtuse. Spikes of secund, widely spaced, 2-flowered verticillasters; bracts oblong to subcircular, 1.5-5 × 1.2-3.8 mm, ciliate. Pedicel ca. 2 mm. Calyx campanulate, ca. 5 × 3.5 mm, yellowish glandular, pilose at base of veins outside, throat pilose annulate; middle tooth of upper lip very large, circular, acute at apex, lateral teeth obliquely ovate-triangular, lower lip teeth lanceolate. Corolla white or purplish, ca. 1.6 cm; throat bullate outside and inside, tube ca. 6 mm; middle lobe obovate-orbicular, ca. 3.8 mm, anterior lateral lobes ca. 0.7 mm, posterior lateral lobes ca. 1 mm. Ovary bullate, hairy. Nutlets yellow-brown, obovoid, ca. 1 mm, netted. Fl. Oct.

Used medicinally for indigestion.

* Open hillsides; 600-1500 m. Guizhou, Yunnan