Aconogonon laxmannii (Lepechin) A. Löve & D. Löve; A. ocreatum (Linnaeus) H. Hara; A. ocreatum var. laxmannii (Lepechin) Tzvelev; Persicaria laxmannii (Lepechin) H. Gross; Pleuropteropyrum laxmannii (Lepechin) Kitagawa; Polygonum laxmannii Lepechin.

Herbs perennial. Stems erect, 30-40(-50) cm tall, branched from base, sparsely pubescent or glabrous, slenderly striate; branches spreading. Petiole 3-5 mm; leaf blade lanceolate or linear-lanceolate, 4-7 cm × 5-8 mm, both surfaces hirsute or abaxially hirsute, base narrowly cuneate, margin entire, shortly ciliate; ocrea tubular, membranous, sparsely hirsute, veined. Inflorescence paniculate, densely flowered; branches spreading; bracts narrowly ovate, pubescent or glabrous, each 1- or 2-flowered. Pedicel 2-2.5 mm, apex articulate. Perianth white, 5-parted; tepals elliptic, 2.5-3 mm. Stamens 8. Styles 3, short; stigmas capitate. Achenes included in persistent perianth, shiny, ovoid, trigonous, 3-3.5 mm. Fl. Jul-Aug, fr. Aug-Sep.

Grassy slopes, wet valleys; 1400-2500 m. Jilin, Nei Mongol [Mongolia, Russia].