Taxon  Report   10161 
Onopordum acanthium  L.
Scotch cottonthistle
Onopordum acanthium
© 2007 Louis-M. Landry
CalPhotos: click on a
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Onopordum acanthium
© 2007 Louis-M. Landry
Onopordum acanthium
© 2013 Richard Spellenberg
Onopordum acanthium, a dicot, is a perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.
It is an invasive plant. The California Invasive Plant Council classifies its potential impact on native ecosystems as high (plant profile / CalWeedMapper).

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Onopordum acanthium
© 2001 CDFA
Family: ASTERACEAE  
Genus: Onopordum
Subspecies and Varieties:
Distribution by County 

Add an Observation of  Onopordum acanthium

Name Status:
Accepted by TJM2 + PLANTS + JM93
 
More information about  Onopordum acanthium
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (ONAC)

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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Jul 31, 2016).

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