A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum
Hosted by the University of Washington Herbarium, Burke Museum
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Asteraceae » Xanthium spinosum
Last updated 11/28/2020 by David Giblin.
Xanthium spinosum L.[FNA21, HC, HC2]
spiny clotbur, spiny cocklebur
Publication: Sp. Pl. 2: 987. 1753.
Origin: Introduced from South America (although treated as native in CA by Jeps. Man.)
selected vouchers: WTU
Notes: FNA21: "Some authors have contended that Xanthium spinosum originated in South America and is introduced and/or naturalized everywhere else that it is found."
Considered native to California in Jepson Manual (1993).
References: (none)
Synonyms & Misapplied Names:
Xanthium ambrosioides Hook. & Arn.
Xanthium spinosum L. var. inerme Bel
