Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"68689 - Eucephalus ledophyllus (A. Gray) Greene var. covillei (Greene) G. L. Nesom, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-149437. Accessed 28 Mar. 2025.