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Rumex venosus Pursh  
Go To Encyclopedia of Life...
Family: Polygonaceae
Veiny Dock
Rumex venosus image
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Sergei L. Mosyakin in Flora of North America (vol. 5)
Plants perennial, glabrous or nearly so, with creeping rhizomes. Stems ascending or, rarely, erect, usually producing axillary shoots near base, (10-)15-30(-40) cm. Leaf blades ovate-elliptic, ob-ovate-elliptic, or ovate-lanceolate, (2-)4-12(-15) × 1-5(-6) cm, subcoriaceous, base narrowly to broadly cuneate, margins entire, flat or slightly undulate, apex acute or acuminate. Inflorescences terminal and axillary, usually occupying distal 2/ 3 of stem/shoot, usually dense, or interrupted in proximal part, broadly paniculate. Pedicels articulated near middle, filiform or slightly thickened, (8-)10-16 mm, articulation distinct, slightly swollen. Flowers 5-15 in whorls; inner tepals distinctly double-reticulately veined, orbiculate or reniform-orbiculate, 13-18(-20) × (20-)23-30 mm, base deeply emarginate or cordate, margins entire, apex rounded, obtuse, rarely subacute, with short, broadly triangular tip; tubercles absent, occasionally very small. Achenes brown or dark brown, 5-7 × 4-6 mm. 2n = 40. Flowering spring-early summer. Sand dunes, sandy and gravelly riverbanks and slopes, deserts, grasslands 200-1500 m; Alta., Man., Sask.; Ariz., Calif., Colo., Idaho, Iowa, Kans., Minn., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Oreg., S.Dak., Tex., Utah, Wash., Wis., Wyo. Rumex venosus is a distinctive species rarely confused with any other members of the genus. However, I have seen herbarium specimens of it misidentified as R. hymenosepalus, and vice versa.

Vascular plants of NE US and adjacent Canada
Glabrous, rhizomatous perennial 2-6 dm; lvs ovate to oblong or lanceolate, flat, entire, 4-12 cm; infl very dense in fr; pedicels weakly jointed near midlength; valves rose-color, 1.5-2 נ2-3 cm, without grains; 2n=40. Dry soil in waste places; native of w. U.S., rarely adventive in our area.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
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Rumex venosus
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Jose Hernandez  
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Gary A. Monroe  
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Jose Hernandez  
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Gary A. Monroe  
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