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):
Lespedeza thunbergii
FAMILY
Fabaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Lespedeza thunbergii
FAMILY
Fabaceae
COMMON NAME:
Thunberg's Lespedeza
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)
James H. Miller, USDA Forest Service, Bugwood.org bug_5421996
June
Leaflets 2-3x long as wide (vs. 1.5-2x in L. bicolor), per Weakley's Flora.
COMPARE
leaves that are trifoliolate and pinnately compound
)
James H. Miller, USDA Forest Service, Bugwood.org bug_5421997
June
Stems purplish when young, many per crown (vs. 1-several in L. bicolor), per Weakley's Flora.
)
James H. Miller, USDA Forest Service, Bugwood.org bug_5421998
June