Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"101623 - Carex atratiformis Britton ssp. raymondii (Calder) Porsild, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-90995. Accessed 29 Apr. 2025.