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dark lamb's-quarters, dark-green goosefoot, green goosefoot, pinyon goosefoot

Stems

erect to ascending, usually much-branched, 0.7–6.5 dm, moderately to densely farinose.

Leaves

nonaromatic;

petiole 0.5–1.5 cm, usually markedly upward curved;

blade ovate, broadly oblong, oblong, oval, or occasionally triangular, prominently 3-veined, 1–3 × 0.4–2.2 cm, 1.5–3 times longer than wide, thick, base rounded to cuneate, margins entire or occasionally with basal lobe, apex obtuse or rounded, farinose abaxially.

Inflorescences

glomerules in terminal and axillary paniculate spikes, 2–8 × 1–1.5 cm;

glomerules maturing unevenly;

bracts linear, 2 × 0.1 mm.

Flowers

perianth segments 5, distinct nearly to base;

lobes obovate, 0.8–0.9 × 0.6–0.8 mm, apex rounded or emarginate, carinate, farinose, not covering fruit at maturity;

stamens 5;

stigmas 2, 0.1 mm.

Achenes

or Utricles ovoid;

pericarp adherent or nonadherent, smooth.

Seeds

0.9–1.3 mm diam., margins acute;

seed coat black, rugulate.

2n

= 18.

Chenopodium atrovirens

Phenology Fruiting mid summer–fall.
Habitat Open dry sandy areas and other disturbed sites
Elevation 100-3400 m (300-11200 ft)
Distribution
from FNA
AZ; CA; CO; ID; MT; NM; NV; OR; UT; WY; AB; BC; SK
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Discussion

Chenopodium atrovirens has been reported for Washington but we have seen no specimens. Reports of C. carnulosum Moquin-Tandon from Texas are, at least in part, this species. We have seen no reliable North American records of this southern South American species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 4.
Parent taxa Chenopodiaceae > Chenopodium > subg. Chenopodium > sect. Chenopodium > subsect. Leptophylla
Sibling taxa
C. albescens, C. album, C. berlandieri, C. bonus-henricus, C. californicum, C. capitatum, C. chenopodioides, C. cycloides, C. desiccatum, C. ficifolium, C. foggii, C. foliosum, C. fremontii, C. glaucum, C. hians, C. incanum, C. leptophyllum, C. macrospermum, C. murale, C. neomexicanum, C. nevadense, C. opulifolium, C. pallescens, C. polyspermum, C. pratericola, C. rubrum, C. simplex, C. standleyanum, C. strictum, C. subglabrum, C. urbicum, C. vulvaria, C. watsonii
Synonyms C. fremontii var. atrovirens
Name authority Rydberg: Mem. New York Bot. Gard. 1: 131. (1900)
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