Santa Monica Mountains National Recreation Area

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Purple Star-thistle *
Centaurea calcitrapa

Family: Asteraceae (SUNFLOWER).
Other common names: red star-thistle.
Generic common name: KNAPWEED, STAR-THISTLE.

Upper Las Virgenes Canyon Open Space: disturbed grassland, June 2006.

Characteristics: Non-Native, Red, Medium, Solitary, Simple, Herbaceous, Annual, Late Spring.

Note: Invasive exotic, NOXIOUS WEED. 		Thumbnail Picture of Centaurea calcitrapa




Detailed Picture 1 of Centaurea calcitrapa


Detailed Picture 2 of Centaurea calcitrapa




Detailed description from UCLA website (in PDF format)



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