Description from Flora of China
Herbs annual. Stems erect, ca. 3 mm in diam., sparsely antrorse pubescent. Petiole 1-3 cm, narrowly winged, densely antrorse pubescent; leaf blade ovate, 5-10 × 3-7 cm, membranous, sparsely appressed pubescent, base shallowly cordate, margin remotely coarse dentate, apex acute. Racemes terminal, to 7.5 cm; bracts subsessile, linear-lanceolate, 4-7 × 1-1.5 mm, densely white pubescent, margin entire, apex acute. Pedicel ca. 2 mm, densely white spreading glandular pubescent. Calyx ca. 2.5 mm, densely glandular pubescent outside; scutellum ca. 1 mm. Corolla purple, ca. 1.9 cm, glandular pubescent outside, glabrous inside, base slightly saccate, straight, abruptly dilated above middle to 4.5 mm wide at throat; middle lobe of lower lip triangular-oblate, to 6 mm wide, apex emarginate; lateral lobes ovate, ca. 1.5 mm wide. Nutlets unknown.
* Coastal hills. Shandong (Lao Shan).