Rumex venosus

Pursh

Fl. Amer. Sept. 2: 733. 1813.

Common names: Veined or veiny dock wild-begonia rumex veine
WeedyIllustratedEndemic
Treatment appears in FNA Volume 5. Treatment on page 505. Mentioned on page 491.
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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, obovate-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.


Phenology: Flowering spring–early summer.
Habitat: Sand dunes, sandy and gravelly riverbanks and slopes, deserts, grasslands 200-1500 m

Distribution

V5 1034-distribution-map.gif

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.

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Rumex venosus"
Sergei L. Mosyakin +
Veined or veiny dock +, wild-begonia +  and rumex veine +
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. +  and Wyo. +
Sand dunes, sandy and gravelly riverbanks and slopes, deserts, grasslands 200-1500 m +
Flowering spring–early summer. +
Fl. Amer. Sept. +
Weedy +, Illustrated +  and Endemic +
Undefined subg. Lapathum +, Rumex sect. Lapathum +  and Rumex subg. Lapathum +
Rumex venosus +
Rumex sect. Axillares +
species +