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

36. Polygonum foliosum H. Lindberg, Meddeland. Soc. Fauna Fl. Fenn. 27: 3. 1900.

多叶蓼 duo ye liao

Herbs annual. Stems decumbent, rarely erect, 40-60 cm tall, slender, much branched, glabrous. Petiole very short or nearly absent; leaf blade narrowly lanceolate, 3-6 cm × 3-5 mm, sparsely pubescent, midvein prominent abaxially, lateral veins inconspicuous on both surfaces, base cuneate, broadly cuneate, or rounded, margin entire, not ciliate, apex acute; ocrea tubular, 8-10 mm, membranous, sparsely appressed hispidulous, apex truncate, cilia 0.5-3 mm. Inflorescence terminal or axillary, spicate, erect, lax, 3-5 cm, slender, interrupted below; bracts funnel-shaped, glabrous, margin ciliate, each 1- or 2-flowered. Perianth pinkish, 5-parted; tepals narrowly elliptic, 1.5-2 mm. Stamens 5. Styles 2. Achenes equaling persistent perianth, black, shiny, ovoid, biconvex, 1.2-2 mm, smooth. 2n = 20.

Water sides, streamsides, along ditches; sea level to 700 m. Anhui, Heilongjiang, Jiangsu, Jilin, Liaoning, ?Nei Mongol, ?Taiwan [Japan, Korea, Russia].

1 Leaves basally cuneate; cilia of ocrea 0.5-1 mm.   36a var. foliosum
+ Leaves basally broadly cuneate or rounded; cilia of ocrea 2-3 mm.   36b var. paludicola

Lower Taxon


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