Polygonum aviculare L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Polygonaceae
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Scientific Name
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Description
Species Description - Freely branched, sprawling to suberect, heterophyllous annual, to 1 or reputedly 2 dm; early lvs lanceolate or lance-ovate, 2.5–6 cm × 4–15 mm, the later ones only a third as large; ocreae 4–8 mm, hyaline, becoming lacerate; mature perianth 2.5–4 mm, divided to well below the middle, its segments subequal, with white to pink margins and flat tip; achenes 2.2–3.2 mm, dark brown, striate-papillose, included or barely exserted; 2n=40, 60. Cosmopolitan weed of cult. fields and waste places.