Compositae Working Group (CWG) (2021). Global Compositae Database. Silphium atropurpureum f. hirticaule Fernald. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1243109 on 2025-03-24
original description(1939). Rhodora 41 page(s): 573 [details]
Unreviewed
Contributed data: Published Data only shown for fields conflicting with the consensus taxon record Rhodora 41(492): [Tropicos] [details] LSID urn:lsid:compositae.org:names:6745D29D-C932-42B3-A6E7-3F3956D61917 [details]