Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"163 - Pellaea glabella Mett. ex Kuhn var. occidentalis (E. E. Nelson) Butters, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-17678. Accessed 09 Feb. 2025.