革叶拳参 ge ye quan shen

Bistorta coriacea (Samuelsson) Yonekura & H. Ohashi.

Herbs perennial. Rhizomes black-brown, curved, large. Stems 1 or 2 from rhizome, erect, 15-30 cm tall, glabrous, simple. Basal leaves petiolate; petiole 3-8 cm; leaf blade ovate-elliptic or ovate-lanceolate, 4-14 × 2-4.5 cm, leathery, abaxially sometimes sparsely pubescent, adaxially glabrous, base truncate or subcordate, veins conspicuous, green, margin with thickened vein tips, revolute, apex acute or slightly obtuse. Cauline leaves shortly petiolate; leaf blade ovate-lanceolate, smaller; ocrea tubular, 4-5 cm, membranous, apex oblique, dehiscent, not ciliate. Inflorescence terminal, spicate, dense, 4-5 cm, 1.5-2 cm in diam.; bracts ovate, 3-4 mm, membranous, apex acuminate. Pedicels longer than bracts, 4-5 mm, slender. Perianth purple-red, 5-parted; tepals oblong, 4-5 mm. Stamens 8; anthers blue-black. Styles 3, free; stigmas capitate. Achenes included in persistent perianth, yellow-brown, shiny, ovoid, trigonous, 3-4 mm. Fl. Jul-Aug, fr. Sep-Oct.

* Grassy slopes, thickets, forest margins; 2800-5000 m. Guizhou, Sichuan, Xizang, Yunnan.