Polygonum erectum 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
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Species Description - Much like no. 3 [Polygonum achoreum S. F. Blake], but somewhat heterophyllous (more so in age), with green or bright yellow-green lvs, the larger ones mostly 25–60 × 10–30 mm; ocreae hyaline-silvery, entire to slightly lacerate; perianth cleft ca 3/4 its length; achenes light to dark brown, striate-papillose. A weed in waste places, widespread (but not common) in the U.S. and s. Can.