Silphium confertifolium Small. Black Belt Rosinweed. Hab: Limestone glades, calcareous clay prairies. Dist: Black Belt of AL and e. MS; in the Black Belt, Wayne County limestone glades, and eastern Jackson prairie variants.
Origin/Endemic status: Endemic
Synonymy: = S, SE1, Perry (1937); < Silphium asteriscus L. var. latifolium (A.Gray) Clevinger – FNA21, K4
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