Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA (5/21/15):
Lychnis flos-cuculi
FAMILY
Caryophyllaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Lychnis flos-cuculi
FAMILY
Caryophyllaceae
GREATER THAN
Flora of North America
Silene flos-cuculi ssp. flos-cuculi
COMMON NAME:
Ragged Robin
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_lyfl3_001_lvd
Petal limbs deeply divided into 4 linear segments, per Weakley's Flora.