Description from Flora of China
Herbs perennial, stoloniferous. Stems erect, 10-30 cm tall, villous to pilose. Petiole 1.3-2(-3.7) cm; leaf blade ovate to ovate-elliptic, 3-5.3 × 2.5-3.8 cm, papery, strigose and densely so abaxially on veins, base cuneate to subtruncate and decurrent, margin irregularly to coarsely crenate, apex obtuse to subrounded. Verticillasters widely spaced, 2-(6)-flowered. Pedicel 3-6(-12) mm, villous. Calyx campanulate, sparsely villous, 5.5-7 mm; teeth subequal, ovate-triangular to triangular, ciliate, ca. 1/2 as long as calyx. Corolla blue or purplish blue with purple lines; tube straight, 1.5-1.8 cm, sparsely pubescent, villous annulate and puberulent inside; upper lip semicircular, emarginate; middle lobe of lower lip 0.9-1.1 cm, triangular-obcordate, 2-lobed; lateral lobes oblong, to 5 mm. Nutlets obovoid, triquetrous, glabrous, netted on back, with an areole adaxially. Fl. Jun-Jul.
* Grassy slopes, moist riverbanks in pine forests, broad-leaved forests; 2500-3700 m. Sichuan, Yunnan.