Description from
Flora of China
Aconogonon sibiricum (Laxmann) H. Hara; Knorringia sibirica (Laxmann) Tzvelev; Persicaria sibirica (Laxmann) H. Gross; Pleuropteropyrum sibiricum (Laxmann) Kitagawa; Polygonum arcticum Pallas ex Sprengel.
Stems 10-25(-43) cm tall. Leaf blade narrowly elliptic or lanceolate, 5-15 mm wide. Inflorescence large. Fl. and fr. Jul-Sep.
Roadsides, saline deserts, sands, riverbanks; sea level to 5000 m. Anhui, Gansu, Hebei, Heilongjiang, ?Henan, Hubei, Hunan, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjiang, Xizang, Yunnan [Kashmir, Kazakhstan, Mongolia, Russia (Far East, Siberia), Sikkim].