Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Brassicales
Flora of North America
Manual of the Southeastern Flora (Small, 1933)
Wart-cress, Lesser Swine-cress