E-Flora BC: Electronic Atlas of the Flora of British Columbia

Chenopodium atrovirens Rydb.
dark lamb's-quarters (pinyon goosefoot)
Amaranthaceae (Amaranth family)
(Previously in Chenopodiaceae)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #13903)

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Distribution of Chenopodium atrovirens
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Species Information

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Annual herb from a taproot; stems erect, solitary, simple to branched, 10-50 cm tall.
Stem leaves lanceolate, usually not arrowhead-shaped, greenish on upper surfaces but sparsely mealy below, stalked, 1-4 cm long, rounded to pointed.
Inflorescence of dense clusters in large terminal and smaller lateral spikes, densely mealy, without stalks.
Thin, membranous envelopes, 1 mm wide; seeds obtusely margined, slightly roughened.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry waste places in the montane zone; rare, scattered throughout BC east of the Coast-Cascade Mountains S of 55degreeN; E to AB and S to IA, CO, NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Chenopodium atrovirens

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 892 892 892
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
7 7 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: IDF(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Chenopodium aridum A. Nels.
Chenopodium fremontii var. atrovirens (Rydb.) Fosberg
Chenopodium wolfii Rydb.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References