Compositae Working Group (CWG) (2021). Global Compositae Database. Picradenia helenioides Rydb.. Accessed at: https://www.compositae.org/aphia.php?p=taxdetails&id=1203564 on 2024-10-23
LSID urn:lsid:compositae.org:names:0C796909-73AA-418E-A8B1-C83D1CDEF3EF [details] Type material 2 Jul 1900, 5495, F.K.Vreeland, P.A.Rydberg, null NY [details]