Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"141363 - Dryopteris expansa (C. Presl.) Fraser-Jenkins & Jermy, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-167412. Accessed 13 Dec. 2024.