Polygonum dumetorum Linnaeus, Sp. Pl., ed. 2, 1: 522. 1762; Bilderdykia dumetorum (Linnaeus) Dumortier; Fagopyrum dumetorum (Linnaeus) Schreber; Helxine dumetorum (Linnaeus) Rafinesque; P. scandens Linnaeus var. dumetorum (Linnaeus) Gleason; Reynoutria scandens (Linnaeus) Shinners var. dumetorum (Linnaeus) Shinners; Tiniaria dumetorum (Linnaeus) Opiz.

Flowers many; bracts each 3-6-flowered. Wings continuous. Fl. Jun-Aug, fr. Jul-Sep.

Grassy slopes, thickets in valleys; 200-2400 m. Hebei, Heilongjiang, Jiangsu, Jilin, Liaoning, Nei Mongol, Shandong, Xinjiang [Bhutan, N India, Japan, Korea, Mongolia, Nepal, Pakistan, Russia; SW Asia, Europe].