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FOC | Family List | FOC Vol. 5 | Polygonaceae | Polygonum

54. Polygonum macrophyllum D. Don, Prodr. Fl. Nepal. 70. 1825.

圆穗拳参 yuan sui quan shen

Herbs perennial. Rhizomes curved, large, 1-2 cm in diam. Stems 2 or 3 from rhizome, erect, 8-30 cm tall, simple. Basal leaves petiolate; petiole 3-8 cm; leaf blade gray-green abaxially, green adaxially, oblong, lanceolate, or linear-lanceolate 3-11 × 0.2-3 cm, abaxially sometimes sparsely pubescent, adaxially glabrous, base subcordate or cuneate, margin with thickened vein tips, revolute, apex acute. Cauline leaves shortly petiolate or subsessile; leaf blade narrowly lanceolate or linear; ocrea: lower part green, upper part brown, tubular, membranous, apex oblique, dehiscent, not ciliate. Inflorescence terminal, shortly spicate, 1.5-2.5 cm, 1-1.5 cm in diam.; bracts ovate, 3-4 mm, membranous, apex acuminate, each 2- or 3-flowered. Pedicel 4-5 mm, slender. Perianth pinkish or white, 5-parted; tepals elliptic, 2.5-3 mm. Stamens 8, exserted; anthers black-purple. Styles 3, connate at base; stigmas capitate. Achenes included in persistent perianth, yellow-brown, shiny, ovoid, trigonous, 2.5-3 mm.

Grassy slopes, alpine meadows; 2000-5000 m. Gansu, Guizhou, ?Henan, Hubei, ?Qinghai, Shaanxi, Sichuan, Xizang, Yunnan [Bhutan, N India, Nepal, Sikkim].

1 Basal leaves oblong or lanceolate, 10-30 mm wide.   54a var. macrophyllum
+ Basal leaves linear-lanceolate, 2-5 mm wide.   54b var. stenophyllum


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