Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"16841 - Arnica amplexicaulis Nutt. ssp. amplexicaulis, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-140719. Accessed 15 Apr. 2025.