Taxon  Report   8366    
Xanthium spinosum  L.
Spiny clotbur,  Spiny cockleburr
Xanthium spinosum
© 2018 Joslyn Curtis
Photos from
CalPhotos / Calflora
Xanthium spinosum
© 2010 Zoya Akulova
Xanthium spinosum
© 2015 Zoya Akulova
Xanthium spinosum, a dicot, is an annual herb that is not native to California.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Xanthium spinosum
© 2014 Richard Spellenberg
Genus: Xanthium
Communities: weed, characteristic of disturbed places, wetland-riparian

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Acanthoxanthium spinosum
PLANTS: Xanthium spinosum var. inerme
More information about  Xanthium spinosum
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (Flora of North America)

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2018. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Dec 17, 2018).