Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"135647 - Alnus incana (L.) Moench ssp. rugosa (Du Roi) R. T. Clausen, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-158572. Accessed 28 Jan. 2025.