Compositae Working Group (CWG) (2024). Global Compositae Database.
Rudbeckia sect.
Akosmia Nutt.. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1081965 on 2025-03-28
Marine Species Traits editorial board (2025). Marine Species Traits.
Rudbeckia sect.
Akosmia Nutt.. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1081965 on 2025-03-28