Botanical name: Koenigia nummulariifolia Family: Polygonaceae (Knotweed family)
Synonyms: Polygonum nummulariifolium
Roundleaf Knotweed is a dwarf perennial herb with stems creeping, forming matted clusters; branches 1.5-3 cm, internodes short, rooting at nodes. Flowers are borne at branch-ends, in dense corymbs. Flowers are white or bright pink, 5-merous, tepals are equal, round to ovate or obtuse, in two whorls, about 1-1.75 mm. Stamens are usually 5, included; anthers purple-red. Styles are 2, very short; stigmas head-like. Leaf-stalks are 2-5 mm, hairless or hairy; leaf blade round or kidney-shaped-round, 3-5 mm in diameter, below hairy, above hairless, midvein prominent below, base rounded, margin nearly entire, fringed with hairs, tip blunt; ocrea tubular, membranous, hairy, oblique. Seedpods are yellow-brown, slightly shiny, broadly ovoid, biconvex, about 1.5 mm. Roundleaf Knotweed is found on grassy slopes in the Himalayas, at altitudes of 3300-4800 m, from Himalayas to China, Myanmar. Flowering: August-September.
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The flower labeled Roundleaf Knotweed is ...