Compositae Working Group (CWG) (2021). Global Compositae Database.
Helianthus nuttallii Torr. & A.Gray. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1096790 on 2024-05-15
Marine Species Traits editorial board (2024). Marine Species Traits.
Helianthus nuttallii Torr. & A.Gray. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1096790 on 2024-05-15