Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
1 Cypselas (4-) 5 (-6)-ribbed; stem either glabrous to glabrescent or glandular-puberulent; heads 3-7 mm in diameter; disc florets 12-29; ray florets (2-) 3-6. | |
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] |