Delaware Wildflowers • Scientific names
Cirsium arvense (L.) Scop.
Canada Thistle
Asteraceae — Aster family
Invasive non-native
White Clay Creek State Park -- Possum Hill
June 2001
Prides Crossing
September 2009
White Clay Creek State Park -- Possum Hill
June 2011
Guide to
Cirsium
of Delaware
More information on this plant, from other sources.
Delaware Wildflowers main page