Compositae Working Group (CWG) (2025). Global Compositae Database.
Haplopappus diplopappus subsp. villosus (Phil.) Klingenb.. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1159489 on 2025-03-12
Marine Species Traits editorial board (2025). Marine Species Traits.
Haplopappus diplopappus subsp. villosus (Phil.) Klingenb.. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1159489 on 2025-03-12