Fuller’s Teasel or Common Teasel [Dipsacus fullonum] photos were taken at Fletcher Park on 11 July 2013 and on 16 July 2016. It’s the member of the Teasel (Dipsacaceae) family. Newcomb’s Wildflower Guide, pages 160-161, states it blooms in summer and fall and can be found in fields and on roadsides. The guide also lists its scientific name as Dipsacus sylvestris.
USDA Plants Listing: Dipsacus sylvestris