Delaware Wildflowers • Months

Canada Thistle
Cirsium arvense
Asteraceae — Aster family
Invasive non-native
Canada Thistle
White Clay Creek State Park -- Possum Hill
June 2001
Canada Thistle
Prides Crossing
September 2009
Canada Thistle
White Clay Creek State Park -- Possum Hill
June 2011

Guide to Cirsium of Delaware

More information on this plant, from other sources.


Copyright David G. Smith

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