Compositae Working Group (CWG) (2024). Global Compositae Database.
Haplopappus inuloides var. linearis (D.D.Keck) B.Boivin. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1162989 on 2025-03-12
Marine Species Traits editorial board (2025). Marine Species Traits.
Haplopappus inuloides var. linearis (D.D.Keck) B.Boivin. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1162989 on 2025-03-12