Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"133787 - Carex tonsa (Fernald) E. P. Bicknell var. rugosperma (Mack.) Crins, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-128130. Accessed 31 Jan. 2025.