Aconogonon alpinum (Allioni) Schur; Persicaria alpina (Allioni) H. Gross; Pleuropteropyrum alpinum (Allioni) Kitagawa (1937), not Koidzumi (1916); ?P. jeholense Kitagawa; ?Polygonum jeholense (Kitagawa) Baranov & Skvortsov ex S. X. Li & Y. L. Chang; P. undulatum Murray (1775), not P. J. Bergius (1767).

Herbs perennial. Stems erect, 50-100 cm tall, branched from above middle; branches striate, not divaricate, sparsely hirsute, rarely glabrous. Petiole 5-10 mm; leaf blade greenish abaxially, green adaxially, ovate-lanceolate or lanceolate, 3-9 × 1-3 cm, both surfaces pilose, base broadly cuneate, margin entire, densely shortly ciliate, apex acute, rarely acuminate; ocrea brown, tubular, membranous, sparsely pilose, dehiscent. Inflorescence terminal, paniculate; branches spreading, glabrous; bracts ovate-lanceolate, membranous, each 1- or 2-flowered. Pedicels longer than bracts, 2-2.5 mm, slender, glabrous, apex articulate. Perianth white, 5-parted; tepals elliptic, equal, 2-3 mm. Stamens 8. Styles very short; stigmas capitate. Achenes exceeding persistent perianth, yellow-brown, shiny, ovoid, trigonous, 4-5 mm. Fl. Jun-Jul, fr. Jul-Aug.

Forest margins, grassy slopes; 800-2400 m. Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol, Qinghai, ?Shandong, Shanxi, Xinjiang [Afghanistan, Kazakhstan, Kyrgyzstan, Mongolia, Russia; SW Asia, Europe].