Description from Flora of China
Roots fleshy. Stems single, erect, 20-100 cm tall, usually simple, ± hirsute. Leaves all subsessile, or lower cauline leaves with petiole up to 3.5 cm; blade ovate, lanceolate, or elliptic, 2-8 × 0.5-4 cm, both surfaces ± white hirsute, margin serrate or crenate, rarely callose-denticulate. Spikes with bract subtending 1-4 flowers; bract sometimes pubescent or rarely callose-denticulate. Calyx usually glabrous, less frequently hispidulous; tube globose or campanulate; lobes 7-10 mm, slightly longer than corolla, recurved after anthesis, rarely callose-denticulate. Corolla purple or blue. Style slightly shorter than corolla. Capsule globose, with 3 broad pores, 4-6 × 4-5 mm, base truncate or concave. Seeds brown-yellow, ovoid to oblong, slightly compressed, ca. 0.5 mm, with 1 rib. Fl. and fr. Jun-Sep (capsule mature in Apr in Guangxi).
● Grassy slopes, forest margins, forests; below 3000 m. Guangxi (Yangshuo), Guizhou, W Hubei, SW Sichuan, Yunnan.