Polygonum hydropiperoides Michx.
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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 - Rhizomatous perennial, erect or ascending, to 1 m; lvs lanceolate to linear; ocreae always strigose and ciliate; peduncles usually strigose, especially above; racemes slender, erect, often interrupted below; ocreolae separate or scarcely overlapping, obconic, usually short-ciliate; perianth white, greenish, or pink, conspicuously exsert; achenes ovoid, black, smooth and shining, trigonous with rounded angles and concave sides, 1.8–3 mm; 2n=20, 40. Wet soil, beaches, marshes, and shallow water; Que. to B.C., s. to S. Amer.
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Common Names
false water-pepper