Description from Flora of China
Stems to 60 cm tall, simple or apically short branched. Stems densely glandular hairy, hollow. Leaves lower 2 pairs smaller than others; petiole to 4 cm, narrowly winged; leaf blade narrowly to broadly ovate, to 9 X 9.5 cm, thin, abaxially grayish white, adaxially green, base broadly cuneate to subcordate, margin toothed to rarely shallowly crenate-toothed. Cymes axillary, 1-3-flowered; peduncle slender, ca. 1.5 cm, glandular hairy; bracts large, foliaceous. Pedicel slender, to 2.5 cm, glandular hairy. Calyx 4-5 mm, glandular pubescent; lobes lanceolate-ovate to lanceolate, apex acute. Corolla light yellow, 1.5-1.8 cm; tube 0.9-1.1 cm; lower lip lobes orbicular, middle lobe larger than other lobes; upper lip ca. 1.5 mm longer than lower lip, lobes rotund, with overlapping margins. Stamens slightly shorter than lower lip; staminode obcordate, ca. 0.5 mm. Ovary ca. 3 mm. Style ca. 8 mm. Capsule narrowly ovoid, 0.9-1.1 cm including beak. Fl. Jun, fr. Jul-Sep.
* On rocks; 2000-3000 m. Shaanxi (Foping Xian).