Calflora
Taxon  Report   8366    
Xanthium spinosum  L.
Spiny clotbur,  Spiny cockleburr
Xanthium spinosum
© 2014 Richard Spellenberg
Photos from
CalPhotos / Calflora
Xanthium spinosum
© 2015 Zoya Akulova
Xanthium spinosum
© 2008 Neal Kramer
Xanthium spinosum, a dicot, is an annual herb that is not native to California.

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Xanthium spinosum
© 2010 Zoya Akulova
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 PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (XASP2)

Search the International Plants Names Index

Search efloras.org (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: http://www.calflora.org/   (Accessed: Oct 16, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.