Chenopodiastrum simplex
giant goosefoot, maple leaf goosefoot
WTU specimens
Other herbaria

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

Conservation Status: Not of concern

Description:
General:

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

Leaves:

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:

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.

Fruits:

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.

E-Flora BC: Chenopodiastrum simplex atlas page.

CalPhotos: Chenopodiastrum simplex photos.

USDA Plants: Chenopodiastrum simplex information.

13 photographs:
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