Vernonia lettermanii Engelmann ex A. Gray. Letterman's Ironweed, Narrowleaf Ironweed. Hab: Gravel bars. Dist: AR and OK, broadly Ouachitan.
Origin/Endemic status: Endemic
Synonymy: = SE1; = Vernonia lettermannii Engelm. ex A.Gray – Ar, FNA19, K3, correctable orthographic error
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