Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"32746 - Pteridium aquilinum (L.) Kuhn var. latiusculum (Desv.) Underw. ex A. Heller, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-18046. Accessed 25 Jan. 2025.