Taxon  Report   1505    
Carduus tenuiflorus  Curtis
Italian thistle,  Slender flowered thistle, Winged plumeless thistle
Carduus tenuiflorus
© 2011 Zoya Akulova
Photos from
CalPhotos / Calflora
Carduus tenuiflorus
© Charles Webber 1998 California Academy of Sciences
Carduus tenuiflorus, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Cal-IPC rating: Limited

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Carduus tenuiflorus
© 2001 CDFA
Genus: Carduus
Name Status:
Accepted by JEF + PLANTS

More information about  Carduus tenuiflorus
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

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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 16, 2018).