Chenopodiastrum simplex
giant goosefoot, maple leaf goosefoot

Distribution: Introduced in much of North America; British Columbia to California in the West.

Habitat: Weed of roadsides and waste areas.

Flowers: June - September

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Erect, simple to freely-branched annual, 2-15 dm. tall, glabrous except in the inflorescence.


Leaves alternate, the blades thin, broadly deltoid-ovate to ovate, up to 20 cm. long, acuminate at the tip and rounded to nearly cordate at the base, the margins wavy, with 2-4 rounded-triangular teeth; the upper leaves reduced and nearly entire, all narrowed abruptly to short, slender petioles.


Flowers sessile, glomerate in large, terminal panicles, sometimes also in reduced lateral spikes or panicles, all often glandular; perianth 5-cleft nearly to the base, the segments ovate to oblong, not strongly keeled; stamens 5, opposite the perianth parts; styles 2.


Utricle 1.5-2 mm. long, the wall adherent to the seed.

Accepted Name:
Chenopodiastrum simplex (Torrey) S. Fuentes, Uotila & Borsch

Synonyms & Misapplications:
Chenopodiastrum hybridum (L.) S. Fuentes, Uotila & Borsch, misapplied
Chenopodium gigantospermum Aellen
Chenopodium hybridum L. var. gigantospermum (Aellen) Rouleau
Chenopodium hybridum L. var. simplex Torr.
Chenopodium simplex (Torr.) Raf. [FNA4]
Additional Resources:

PNW Herbaria: Specimen records of Chenopodiastrum simplex in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Chenopodiastrum simplex checklist entry.

OregonFlora: Chenopodiastrum simplex information.

E-Flora BC: Chenopodiastrum simplex atlas page.

CalPhotos: Chenopodiastrum simplex photos.

USDA Plants: Chenopodiastrum simplex information.

13 photographs:
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