Silphium compositum Michaux var. ovatifolium Torrey & A. Gray. Florida Rosinweed. Phen: May-Sep. Hab: Longleaf pine sandhills. Dist: Se. SC south to c. peninsular FL and FL Panhandle.

Origin/Endemic status: Endemic

Synonymy: = K1; = Silphium compositum Michx. ssp. ovatifolium (Torr. & A.Gray) C.R.Sweeney & T.R.Fisher – Sweeney (1970); = Silphium ovatifolium (Torr. & A.Gray) Small – S, Perry (1937); < Silphium compositum Michx. – Fl7, FNA21, K3, K4, RAB, SE1, WH3

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