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Polygonum divaricatum

Description from Flora of China

Aconogonon divaricatum (Linnaeus) Nakai ex T. Mori; Persicaria divaricata (Linnaeus) H. Gross; Pleuropteropyrum divaricatum (Linnaeus) Nakai.

Herbs perennial. Stems erect, 70-120 cm tall, glabrous, branched from base; branches spreading, divaricate. Petiole ca. 5 mm; leaf blade lanceolate or oblong, 5-12 × 0.5-2 cm, both surfaces glabrous or pilose, base cuneate or narrowly cuneate, margin entire, shortly ciliate, apex acute; ocrea tubular, 1-2 cm, membranous, pilose or glabrous, oblique, dehiscent. Inflorescence paniculate; branches spreading; bracts ovate, veined, each 2- or 3-flowered. Pedicels equaling bracts, 2.5-3 mm, apex articulate. Perianth white, 5-parted; tepals elliptic, 2.5-3 mm, unequal. Stamens 7 or 8, included. Styles 3, very short; stigmas capitate. Achenes distinctly exceeding persistent perianth, yellow-brown, shiny, broadly ellipsoid, trigonous, 5-6 mm. Fl. Jul-Aug. fr. Aug-Sep.

Thickets in valleys, grassy slopes; 300-2100 m. Hebei, Heilongjiang, ?Henan, ?Hubei, Jilin, Liaoning, Nei Mongol, ?Qinghai, Shandong, Shanxi [Korea, Mongolia, Russia (Far East, E Siberia)].


 

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