Taxonomy as "verbenaefolium var. Saundersii" [details]
Compositae Working Group (CWG) (2025). Global Compositae Database. Eupatorium verbenifolium var. saundersii Porter ex Britton. Accessed at: https://www.compositae.org/gcd/aphia.php?p=taxdetails&id=1244377 on 2025-09-13