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

67. Polygonum umbrosum Samuelsson in Handel-Mazzetti, Symb. Sin. 7: 182. 1929.

荫地蓼 yin di liao

Herbs perennial. Stems decumbent, 70-90 cm tall, angulate, glabrous or sparsely shortly bristly; branches slender. Petiole 5-10 mm, winged; leaf blade ovate-oblong, 7-10 × 2-3 cm, papery, both surfaces glabrous, base broadly cuneate, decurrent along petiole forming a wing, margin sparsely shortly setose, apex ?long acuminate; ocrea brown, tubular, 1-1.5 cm, membranous, pilose, apex truncate, ciliate. Inflorescence terminal or axillary, capitate, several capitula aggregated and panicle-like; peduncle glabrous or sparsely shortly glandular hairy; bracts broadly ovate, 1.5-2 mm. Pedicels shorter than bracts. Perianth pinkish, 5-parted; tepals elliptic, 2-2.5 mm. Stamens 6-8, included; anthers purple, elliptic. Styles 3, connate to below middle; stigmas capitate. Achenes included in persistent perianth, yellow-brown, opaque, broadly ovoid, trigonous, ca. 2 mm, densely pitted. Fl. Jul-Aug, fr. Aug-Sep.

* Shaded places in valleys; ca. 2200 m. Yunnan.


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