Herbs, erect, 50-130 cm tall, glabrous except for glandular hairs on pedicels. Stems quadrangular, to 8 mm in diam., narrowly winged, white pithed or hollow with age. Petiole to 5 cm, narrowly winged; leaf blade ovate to ovate-lanceolate, 7-10 cm, base rounded to subcordate, margin shallowly serrate. Thyrses terminal, to 20 cm; cymes numerous. Pedicel to 1 cm. Calyx 2-3 mm; lobes broadly ovate, margin broadly membranous, apex nearly rounded. Corolla green, purplish yellow, or brown, 4-6 mm; tube subglobose; lower lip middle lobe somewhat narrow; upper lip slightly longer than lower lip, lobes semiorbicular, with overlapping margins. Stamens almost as long as lower lip; staminode reniform. Ovary ca. 2 mm. Style ca. 2 mm. Capsule ovoid-globose, 5-6 mm. Fl. Jun-Aug, fr. Jul-Sep.

Forests, along streams; 900-1700 m. N Xinjiang [Russia; Europe].