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..2 Leaves unlobed; stems glandular-puberulent; [endemic in AR]
..2 Leaves pinnatifid, with 5-11 lobes; stems glabrous (or glabrescent upwards); [KY and se. MO south through TN, AL, and GA to Panhandle FL]
....3 Leaves of the midstem and below pinnatifid, with 5-7 primary lobes; phyllaries glandular-pubescent and with abundant longer, eglandular septate hairs; [widespread]
....3 Leaves of the midstem and below bipinnatifid to nearly pinnate-pinnatifid, with 10-21 primary lobes; phyllaries densely glandular-puberulent and with longer, eglandular, septate hairs lacking, or few and restricted to the margins; [narrow endemic of Marion County, TN]