Description from Flora of China
Perennials, 10-20 cm tall. Stems ascending, creeping near base, sparsely with gray-white multicellular hairs, more densely so below nodes. Leaves 3-5 pairs, evenly or unevenly distributed; petiole 5-7 mm; leaf blade ovate to narrowly ovate, membranous, abaxially glabrous or occasionally hairy, adaxially puberulent, base obtuse, margin 4-9-toothed on each side and rarely double dentate, apex obtuse to acute; upper leaves 1.5-3.5 X 0.8-1.5 cm. Racemes 1 or 2, axillary in upper leaves, 5-10 cm, 5-10-flowered, axis and pedicels puberulent; peduncle 2-3 cm; bracts linear to linear-lanceolate, usually shorter than pedicel, subglabrous. Pedicel straight, 5-8 mm. Calyx 4-lobed; lobes linear-lanceolate to linear-oblong, 3-4 mm, subequal, sparsely ciliate with multicellular glandular hairs. Corolla white, purple striate, rotate, ca. 1 cm in diam.; tube less than 1.5 mm; throat sparsely villous. Stamens slightly longer than corolla. Capsule pliciform-rhomboid, strongly compressed, 3-3.5 X 7-8 mm, base cuneate-truncate, base angle greater than 120°, lateral angles acute to obtuse, margin apically sparsely ciliate with multicellular glandular hairs, emarginate. Style 5.5-8 mm. Seeds 2-10 per locule, oblong-ovoid, flattened, slightly convex, ca. 1.2 mm. Fl. Jun-Jul.
* Forests, meadows; 1500-3000 m. W Hubei, S Shaanxi, NE Sichuan.