Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Caryophyllales
WEAKLEY'S FLORA (11/30/12):
Rumex obtusifolius
FAMILY
Polygonaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Rumex obtusifolius
FAMILY
Polygonaceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (1968) 063-02-009:
Rumex obtusifolius
FAMILY
Polygonaceae
COMMON NAME:
Broadleaf Dock, Bitter Dock
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JK Marlow jkm0505f_02
May Greenville County SC
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JK Marlow s000510_b
May Greenville County SC
Leaves are wide, heart-shaped at the base, and lack wavy margins, per Weeds of Southern Turfgrasses.