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

66. Polygonum runcinatum Buchanan-Hamilton ex D. Don, Prodr. Fl. Nepal. 73. 1825.

羽叶蓼 yu ye liao

Herbs perennial. Rhizomes stout. Stems suberect or ascending, 30-60 cm tall, angulate, pilose or subglabrous, usually nodes retrorsely appressed hispid. Petiole 1-1.5 cm, narrowly winged, base auriculate, upper ones often shortly petiolate or subsessile; leaf blade 4-8 × 2-4 cm, pinnatifid; terminal lobe triangular, large, apex acuminate; lateral lobes 1-3 pairs, smaller, margin shortly ciliate, both surfaces sparsely strigose or glabrous; ocrea tubular, lax, ca. 1 cm, membranous, pubescent, apex truncate, ciliate. Inflorescence terminal, corymbose or paniculate, capitate, dense, 0.5-1.5 cm in diam.; peduncle glandular hairy; bracts narrowly ovate, margin membranous. Pedicels shorter than bracts, slender. Perianth pinkish or white, 5-parted; tepals narrowly ovate, 3-3.5 mm. Stamens usually 8, included; anthers purple. Styles 3, connate to below middle. Achenes included in persistent perianth, black-brown, opaque, ovoid, trigonous, 2-3 mm. 2n = 22*.

Grassy slopes, mountain slopes, wet valleys, thickets in valleys; 800-3900 m. Anhui, ?Fujian, Gansu, Guangxi, Guizhou, Henan, Hubei, Hunan, ?Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [Bhutan, N India, Indonesia (Sumatra), ?Kashmir, Malaysia, Myanmar, Nepal, Philippines, Sikkim, Thailand].

1 Capitulum 1-1.5 cm in diam., usually corymbose; leaf blade sparsely strigose on both surfaces, lateral lobes 1-3 pairs.   66a var. runcinatum
+ Capitulum 0.5-0.7 cm in diam., several capitula paniculate; leaf blade glabrous or sparsely shortly strigose on both surfaces, lateral lobes in 1 pair.   66b var. sinense


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