Chenopodium atrovirens

Rydberg

Mem. New York Bot. Gard. 1: 131. 1900.

IllustratedEndemic
Synonyms: Chenopodium fremontii var. atrovirens (Rydberg) Fosberg
Treatment appears in FNA Volume 4. Mentioned on page 290.

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.


Phenology: Fruiting mid summer–fall.
Habitat: Open dry sandy areas and other disturbed sites
Elevation: 100-3400 m

Distribution

V4 547-distribution-map.gif

Alta., B.C., Sask., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wyo.

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.

Selected References

None.

Lower Taxa

None.

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

... more about "Chenopodium atrovirens"
dehiscent +  and indehiscent +
Carinate (?) +, Emarginate (?) +, Rounded (?) +  and Obtuse (?) +
Steven E. Clemants +  and Sergei L. Mosyakin +
Rydberg +
slippery +
aromatic +
rounded +  and cuneate +
Leptophylla +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
triangular +, oval +, oblong +  and ovate +
thick;0.4cm;2.2cm +
persistent +  and deciduous +
2 cm20 mm <br />0.02 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (?) +
reddish-brown +, black +, brown +  and green +
Alta. +, B.C. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +  and Wyo. +
100-3400 m +
hippocrepiform +  and annular +
symmetric +, or +  and uniseriate +
dehiscent +  and indehiscent +
Open dry sandy areas and other disturbed sites +
small white +
inflated +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
sessile +  and petiolate +
nonaromatic +
not fleshy +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
obovate +
0.6mm;0.8mm +
not winged +  and winged +
occasionally +  and entire +
glabrous +  and farinose +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
nonadherent +  and adherent +
chartaceous +  and membranaceous +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Fruiting mid summer–fall. +
Mem. New York Bot. Gard. +
pointing +  and ascending +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (?) +  and 0.13 cm1.3 mm <br />0.0013 m <br /> (?) +
lenticular +  and subglobose +
Illustrated +  and Endemic +
compound +, dense +  and loose +
cylindric +
not imbricate +
keeled +  and rounded +
much-branched +
opposite +  and alternate +
erect +  and ascending +
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 fremontii var. atrovirens +
Chenopodium atrovirens +
Chenopodium subsect. Leptophylla +
species +
dehiscent +  and indehiscent +
glabrous +  and pubescent +
polygamous +, dioecious +  and monoecious +
not imbricate +
keeled +  and rounded +