Taxon  Report   1851 
Centaurea melitensis  L.
Maltese star thistle,  Napa star thistle, tocalote

Centaurea melitensis
© 2007 Neal Kramer
Centaurea melitensis
© 2008 Keir Morse
Centaurea melitensis, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.
The California Invasive Plant Council classifies its potential impact on native ecosystems as moderate   (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
Centaurea melitensis
© 2005 James M. Andre
Genus: Centaurea
agricultural weed, weed, characteristic of disturbed places
Habitat: disturbed [Walker]
Distribution by County 

Add an Observation of  Centaurea melitensis

Name Status:
Accepted by TJM2 + PLANTS + JM93
 Information about  Centaurea melitensis  from other sources:

Photos on CalPhotos / Google Images

website references on Google

Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation. on the
International Plants Names Index

Search (Flora of North America)

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]. 2015. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 05, 2015).

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