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: Fabids: Fabales
Yellow Sweetclover, Yellow Melilot, Ribbed Melilot
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Roxanna Martin rlm52009_007
May Spartanburg County SC
M. albus & officinalis are apparently incompatible should not be synonymized, per Weakley's Flora.
JK Marlow s040519_ab
May Greenville County SC
Inflorescence a slender, axillary, pedunculate, spike-like raceme, per Vascular Flora of the Carolinas.
JK Marlow s050622_b
June Greenville County SC
Leaflets mostly oblanceolate to obovate or somewhat elliptic, per Vascular Flora of the Carolinas.
COMPARE leaves that are trifoliolate and pinnately compound