Purple Star-thistle *

Centaurea calcitrapa

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

Location: 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.