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 nonaromatic; 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

"narrower" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Chenopodium rubrum"
dehiscent +  and indehiscent +
Steven E. Clemants +  and Sergei L. Mosyakin +
Linnaeus +
slippery +
aromatic +
cuneate +
Undefined subg. Blitum +
1 cm10 mm <br />0.01 m <br /> (9 cm90 mm <br />0.09 m <br />) +
triangular +  and rhombic +
1cm;6cm +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
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 +
hippocrepiform +  and annular +
symmetric +, or +  and uniseriate +
dehiscent +  and indehiscent +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
subglobose +
small white +
inflated +
sessile +  and petiolate +
nonaromatic +
not fleshy +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
lanceolate +  and elliptic +
membranaceous +
0.4mm;0.8mm +
not winged +  and winged +
entire +  and dentate +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
reticulate-punctate +
nonadherent +
chartaceous +  and membranaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
pointing +  and ascending +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
reddish-brown +
verrucate +  and striate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
horizontal +  and vertical +
Weedy +  and Illustrated +
cylindric +
not imbricate +
keeled +  and rounded +
2 (?) +  and 3 (?) +
much-branched +
opposite +  and alternate +
erect +  and ascending or prostrate +
not fleshy +
filiform +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Chenopodium rubrum +
Chenopodium sect. Pseudoblitum +
species +
dehiscent +  and indehiscent +
glabrous +  and pubescent +
polygamous +, dioecious +  and monoecious +
not imbricate +
keeled +  and rounded +