https://fsus.ncbg.unc.edu/main.php?pg=show-taxon-detail.php&lsid=urn:lsid:ncbg.unc.edu:taxon:{656F3272-847C-4026-9991-02AD85514A04}
Helianthus silphioides Nuttall. Phen: Aug-Oct. Hab: Woodland edges. Dist: S. KY, s. IL, and s. MO south to AL, MS, LA, and e. OK.
Origin/Endemic status: Endemic
Synonymy: = Ar, C, F, FNA21, Il, K1, K3, K4, SE1, Tn; = Helianthus atrorubens L. var. pubescens Kuntze – G; < Helianthus atrorubens L. – S
Heliophily: 8
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