Description from Flora of China
Perennials, 10-25 cm tall. Stems ascending, densely villous with gray-white multicellular hairs. Petiole 5-10 mm, decreasing in size upward; leaf blade orbicular to deltoid-ovate, 1-3 X 1-2 cm, lower ones smaller, pubescent, base truncate, margin dentate, apex obtuse to acute. Racemes opposite in axils of uppermost leaves, 2-6 cm, 4-8-flowered, with yellow-white multicellular hairs (except for corolla); peduncle 1-3 cm; bracts linear, 3-5 mm. Pedicel straight, 3-5 mm. Calyx 4-lobed; lobes broadly linear to linear-oblanceolate, 4-5 mm, subequal. Corolla pink, rotate, 0.8-1.2 cm in diam.; tube less than 1.5 mm; throat hairy; lobes obovate to orbicular. Stamens slightly shorter than corolla. Capsule obcordate-reniform to reniform, strongly compressed, ca. 4 X 6-7 mm, lateral angles rounded to rounded-obtuse, margin ciliate with multicellular glandular hairs. Style ca. 3 mm. Seeds 2-10 per locule, flattened, slightly convex. Fl. May-Jun.
* Forests, grassy slopes; 2000-2700 m. Sichuan.