Description from Flora of China
Perennials, 10-15 cm tall. Stems 1, simple, erect or ascending, subglabrous, entirely villous with multicellular hairs, or hairs only along 2 lines. Leaves 3-5 pairs, lower and middle 1 or 2 pairs distant, with petiole 1.5-3 cm, others often subwhorled below inflorescences and with a shorter petiole or sessile and leaf blade large; leaf blade ovate to ovate-lanceolate, 3-6 X 1.5-3.5 cm, papery, glabrous, abaxially purplish, base rounded to cuneate, margin dentate toothed toward leaf apex, apex acute to obtuse. Racemes 2-4, opposite, axillary in uppermost leaves, 8-12 cm, lax, many flowered, axis and pedicels sparsely pubescent with multicellular hairs; peduncle 3-6 cm; bracts glabrous, slightly shorter than pedicel. Pedicel straight, 5-7 mm, slightly elongated in fruit. Calyx 4-lobed; lobes lanceolate, 3-4 mm, subequal, glabrous. Corolla white or purple striate, rotate, 1-1.3 cm in diam.; tube less than 1.5 mm; throat hairy. Stamens as long as corolla. Capsule pliciform-rhomboid, strongly compressed, ca. 4 X 9-10 mm, almost entirely glabrous, base angle 120°, lateral angles acute, emarginate. Style 6-8 mm. Seeds 2-10 per locule, ovoid, flattened, slightly convex, ca. 1.5 mm. Fl. Jun.
* Shaded and moist places; 1000-2000 m. W Hubei, E Sichuan (Chengkou Xian, Nanchuan Xian).