耳叶拳参 er ye quan shen

Bistorta manshuriensis Komarov.

Herbs perennial. Rhizomes black, curved, short, ca. 1 cm in diam. Stems usually numerous from rhizome, erect, 60-80 cm tall, simple, glabrous. Basal leaves long petiolate; petiole 8-15 cm; leaf blade gray-green abaxially, green adaxially, oblong or lanceolate, 13-15 × 2-3 cm, papery, both surfaces glabrous, base cuneate, decurrent along petiole forming narrow wing, margin entire, apex acuminate. Cauline leaves sessile; leaf blade lanceolate; upper leaves clasping, auriculate; ocrea: lower part green, upper part brown, tubular, membranous, oblique, not ciliate, cleft to middle. Inflorescence terminal, spicate, 4-8 cm, ca. 1 cm in diam.; bracts ovate, membranous, apex cuspidate, each 2- or 3-flowered. Pedicels longer than bracts, 4-5 mm, articulate at apex. Perianth pinkish or white, 5-parted; tepals elliptic, ca. 3 mm. Stamens 8, exserted. Styles 3; stigmas capitate. Achenes included in persistent perianth, shiny, ovoid, sharply trigonous, 3-3.5 mm. Fl. Jun-Jul, fr. Aug-Sep.

Grassy slopes, forest margins, valleys; 800-1800 m. Heilongjiang, Jilin, Liaoning, Nei Mongol [Korea, Russia (Far East)].