You may find it helpful to read Lespedeza Species in the Carolinas by Bill Stringer.
Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Fabales
WEAKLEY'S FLORA (11/30/12):
Kummerowia stipulacea
FAMILY
Fabaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Kummerowia stipulacea
FAMILY
Fabaceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (1968) 098-27-001:
Lespedeza stipulacea
FAMILY
Fabaceae
COMMON NAME:
Korean-clover, Korean Lespedeza
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Richard and Teresa Ware rtw_k_stipulacea_4
September
Leaflets emarginate at the apex, conspicuously spreading-ciliate, per Weakley's Flora.
COMPARE
leaves that are trifoliolate and pinnately compound
)
Terry Holdsclaw tdh_kummerowia_stipulacea
September Catawba County NC
Mid-stem leaves with petioles 4-10mm long; stems antrorsely appressed-strigose, per Weakley's Flora.