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

Amaranthus powellii S. Watson
Powell's amaranth (Bouchon's amaranth; green pigweed)
Amaranthaceae (Amaranth family)

Introduction to Vascular Plants

Distribution of Amaranthus powellii
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SUBTAXA PRESENT IN BC

Amaranthus powellii ssp. bouchonii
Amaranthus powellii ssp. powellii

Species Information

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Illustration Source: The Illustrated Flora of British Columbia

General:
Annual herb from a taproot; stems erect, simple to freely branched, 0.3-2.0 m tall, grooved, often reddish, glabrous to short-hairy or sparsely hairy below the flowers.

Leaves:
Alternate or opposite, leaf blades 2.5-14 cm long, glabrous or nearly so, egg-shaped to deltoid-elliptic.

Flowers:
Inflorescence in terminal and axillary spikes; bracts linear-lanceolate and spiny; sepals unequal; stamens 3-4.

Fruits:
Capsules opening along an "equator", the top coming off like a lid, 1-seeded; seeds 1 mm long, lens-shaped.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist to dry fields, disturbed areas and waste places; infrequent in SW and SC BC, known from the Gulf Islands, the Vancouver area and the Okanagan Valley; throughout N. America, S. America and the Old World.

Source: The Illustrated Flora of British Columbia

Climate

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.

Status Information

Scientific Name	Origin Status	Provincial Status	BC List (Red Blue List)	COSEWIC
Amaranthus powellii ssp. bouchonii	Exotic	SNA	Exotic	Not Listed
Amaranthus powellii ssp. powellii	Exotic	SNA	Exotic	Not Listed

BC Ministry of Environment: BC Species and Ecosystems Explorer, the authoritative source for conservation information in British Columbia.

Taxonomic and Nomenclatural Links

Flora North America treatment for Amaranthaceae
Flora North America treatment for Amaranthus powellii
Genetic information (NCBI Taxonomy Database)
International Plant Names Index
Taxonomic Information from the World Flora Online
Integrated Taxonomic Information System

Additional Range and Status Information Links

Burke Museum of Natural History (Washington State records)
CalFlora
Consortium of Pacific Northwest Herbaria records
Jepson Interchange
NatureServe Explorer
USDA

Additional Photo Sources

Images From CalPhoto
UT Austin's Native Plant Database
Google Image Search
Flickr Image Search

General References

Google Scholar Search
Family References
General Botanical References for BC

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2025-02-16 11:45:41 PM ]

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