Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"131719 - Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-123614. Accessed 30 Jan. 2025.