Taxon  Report   1851    
Centaurea melitensis  L.
Maltese star thistle,  Napa star thistle, Tocalote
Centaurea melitensis
© 2005 James M. Andre
Photos from
CalPhotos / Calflora
Centaurea melitensis
© 2018 Stacie Sherman
Centaurea melitensis
© 2018 Zoya Akulova
Centaurea melitensis, 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: Moderate

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
Centaurea melitensis
© 2012 Gary McDonald
Genus: Centaurea
Communities: agricultural weed, weed, characteristic of disturbed places

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

More information about  Centaurea melitensis
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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 16, 2019).