Taxon  Report   7622    
Silybum marianum  (L.) Gaertn.
Blessed milkthistle,  Milk thistle
Silybum marianum
© 2018 Stacie Wolny
Photos from
CalPhotos / Calflora
Silybum marianum
© 2018 Vicki Salazar
Silybum marianum
© 2018 Angelique Herman
Silybum marianum, a dicot, is an annual or perennial 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
Silybum marianum
© 2018 Stacie Wolny
Genus: Silybum
Communities: weed, characteristic of disturbed places

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Carduus marianus
PLANTS: Mariana mariana
More information about  Silybum marianum
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).