Delaware Wildflowers • Common names
Bull Thistle
Cirsium vulgareAsteraceae — Aster family
Non-native
Bellevue State Park
August 2001
White Clay Creek State Park -- Creek Road
September 2010
Guide to Cirsium of Delaware
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.