Yellow Star-thistle, Centaurea solstitialis

Below Elsinore Peak, S. Main Divide, 6-25-11. © Ron Vanderhoff.	Yellow Star-thistle Centaurea solstitialis Exotic species on the RED ALERT Emergent Invasives list (California Native Plant Society, Orange County Chapter) Native to the Mediterranean region Back to Asteraceae of Orange County, California Back to Plants of Orange County, California Back to Natural History of Orange County, California
San Juan Creek, old bridge to 2.2 mi E, 9-18-11. © Ron Vanderhoff.	Upper Silverado Cyn., 6-28-12. © Ron Vanderhoff.
Coal Canyon, 6-17-18. © Ron Vanderhoff.
Hwy 74, .15 mi. NE Tenaja Tr. Trail, 6-24-12. © Ron Vanderhoff.	Elsinore Peak vic, W and S, 5-26-12. © Ron Vanderhoff.
Centaurea solistitialis, Hwy 74, nr. Ortega Falls, 8-15-13. © Ron Vanderhoff.	Centaurea solistitialis, Hwy 74, nr. Ortega Falls, 8-15-13. © Ron Vanderhoff.
Elsinore Peak vic, W and S, 5-26-12. © Ron Vanderhoff.	Acjachemen Meadow, Hwy 74, 7-6-14. © Ron Vanderhoff.
Upper Silverado Cyn., 6-28-12. © Ron Vanderhoff.	Acjachemen Meadow, Hwy 74, 7-6-14. © Ron Vanderhoff.
Left: Centaurea solstitialis; Right: C. melitensis. Elsinore Peak vic, 5-26-12. © Ron Vanderhoff.	Left: Centaurea melitensis; Right: C. solstitialis. Elsinore Peak vic, W and S, 5-26-12. © Ron Vanderhoff.