Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"118146 - Pellaea glabella Mett. ex Kuhn var. simplex Butters, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-77736. Accessed 08 Apr. 2025.