Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read more about Blessed Thistle at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
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Joseph M. DiTomaso, University of California - Davis, Bugwood.org bug_5374323
Heads sessile, closely subtended & partially concealed by large foliar bracts, per Weakley's Flora.