Taxon  Report   1847 
Centaurea diffusa  Lam.
Diffuse knapweed,  White knapweed
Centaurea diffusa
© 2002 Molly Elizabeth Bagley
CalPhotos: click on a
photo to see it bigger
Centaurea diffusa
© 2001 CDFA
Centaurea diffusa, 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 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 diffusa
© 2001 CDFA
Family: ASTERACEAE  
Genus: Centaurea
Name Status:
Accepted by TJM2 + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Acosta diffusa
More information about  Centaurea diffusa
Photos on CalPhotos / Google Images

Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (CEDI3)

Original Publication citation (ITIS)

Search the International Plants Names Index

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: Feb 14, 2016).

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