Xanthium spinosum
spiny clotbur, spiny cockleburr
WTU images
WTU specimens
Other herbaria

Flowers: July - October

Origin: Introduced from South America (although treated as native in CA by Jeps. Man.)

Conservation Status: Not of concern


[none provided]

Accepted Name:
Xanthium spinosum L.
Publication: Sp. Pl. 2: 987. 1753. 1753.

Synonyms & Misapplications:
Xanthium ambrosioides Hook. & Arn.
Xanthium spinosum L. var. inerme Bel
Additional Resources:

PNW Herbaria: Specimen records of Xanthium spinosum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Xanthium spinosum checklist entry.

E-Flora BC: Xanthium spinosum atlas page.

CalPhotos: Xanthium spinosum photos.

USDA Plants: Xanthium spinosum information.

11 photographs:
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