Chenopodium rubrum

Linnaeus

Sp. Pl. 1: 218. 1753.

Common names: Red pigweed red goosefoot coast-blite
WeedyIllustrated
Treatment appears in FNA Volume 4. Treatment on page 282. Mentioned on page 276, 279.

Stems erect to ascending or prostrate, much-branched, 0.1–6(–8) dm, glabrous. Leaves non-aromatic; petiole 0.05–0.45 cm; blade triangular to rhombic, 1–9 × 1–6 cm, base cuneate, margins dentate or entire, apex obtuse to acute. Inflorescences lateral glomerules sessile on lateral branched spikes; glomerules subglobose, 2–5 mm diam.; bracts linear, 0.4–2 cm. Flowers: perianth segments 3 or 4, usually connate only at base; lobes lanceolate to elliptic, 0.8–1 × 0.4–0.8 mm, membranaceous, apex broadly acute to rounded, occasionally deeply retuse, rounded or occasionally keeled, glabrous, green and covering fruit at maturity; stamens 2–3; stigmas 2, 0.1 mm. Utricles ovoid; pericarp nonadherent, reticulate-punctate. Seeds vertical and occasionally horizontal, ovoid, 0.6–1(–1.2) mm diam., margins rounded; seed coat reddish brown, smooth. 2n = 18.

Distribution

V4 519-distribution-map.gif

Alta., B.C., Man., N.B., N.S., N.W.T., Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Iowa, Kans., Maine, Mass., Mich., Minn., Mo., Mont., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Oreg., Pa., R.I., S.Dak., Utah, Wash., Wis., Wyo., Europe.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Vertical seeds 0.6-0.8(-1) mm diam.; stems erect or ascending, 1.5-6(-8) dm; leaf blade margins deeply dentate Chenopodium rubrum var. rubrum
1 Vertical seeds 0.8-1(-1.2) mm diam.; stems prostrate or spreading, 0.1-1.8 dm; leaf blade margins entire or shallowly dentate Chenopodium rubrum var. humile
... more about "Chenopodium rubrum"
Steven E. Clemants +  and Sergei L. Mosyakin +
Linnaeus +
Undefined subg. Blitum +
Red pigweed +, red goosefoot +  and coast-blite +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Utah +, Wash. +, Wis. +, Wyo. +  and Europe. +
Weedy +  and Illustrated +
Chenopodium rubrum +
Chenopodium sect. Pseudoblitum +
species +