狐尾拳参 hu wei quan shen

Bistorta alopecuroides (Turczaninow ex Besser) Komarov; B. alopecuroides (Turczaninow ex Besser) Komarov f. pilosa (C. F. Fang) Kitagawa; Polygonum alopecuroides Turczaninow ex Besser f. pilosum C. F. Fang.

Herbs perennial. Rhizomes curved, large, 1-2 cm in diam. Stems erect, 50-90 cm tall, simple, glabrous. Basal leaves long petiolate; petiole 10-20 cm; leaf blade gray-green abaxially, green adaxially, narrowly oblong or oblong-lanceolate, 10-15 × 1-2 cm, papery, both surfaces glabrous or pubescent, base cuneate, decurrent along petiole, margin entire, apex acuminate. Cauline leaves shortly petiolate or subsessile, lanceolate, base subrounded or nearly cordate, apex acuminate; ocrea: lower part green, upper part brown, tubular, membranous, dehiscent at middle, not ciliate. Inflorescence terminal, spicate, dense, 4-7 cm, ca. 1 cm in diam.; bracts broadly elliptic, apex caudate, each 2- or 3-flowered. Pedicels longer than bracts, slender. Perianth white or pinkish, 5-parted; tepals narrowly elliptic, 2.5-3 mm. Stamens 8, exserted. Styles 3, free; stigmas capitate. Achenes included in persistent perianth, brown, shiny, narrowly ovoid, sharply trigonous, ca. 3 mm. Fl. Jun-Jul, fr. Jul-Aug.

Mountain slopes, meadows; 900-2300 m. Heilongjiang, Jilin, Liaoning, Nei Mongol [Mongolia, Russia (Far East, Siberia)].