Description from Flora of China
Herbs erect, rhizomatous. Stems 40-70 cm tall, including inflorescence, glabrous or sparsely puberulent except for white hirsute nodes, unbranched to branched above middle, base leafless. Petiole 3-7 mm, sparsely white hirsute; leaf blade membranous, oblong, 3-5.5 × 1.3-2 cm, adaxially sparsely white hirsute to subglabrous, abaxially glabrous except for sparsely white hirsute midrib and veins, base shallowly cordate, apex acute. Racemes terminal, 7-9 cm, densely glandular puberulent; bracts sessile, triangular-ovate, 3-15 mm, reduced upward, margin subentire. Pedicel ca. 2 mm. Calyx ca. 4.5 mm; scutellum ca. 1 mm. Corolla ca. 1.8 cm, glabrous except sparsely white pilose on middle lobe of lower lip inside; tube ca. 1.5 cm, base slightly saccate, bent, gradually widened to 5 mm wide at throat; middle lobe of lower lip triangular-ovate, to 5 mm wide, apex emarginate; lateral lobes ovate, ca. 1.75 mm wide. Nutlets unknown. Fl. May.
* Fields. Jiangsu, Jiangxi, Shandong.