Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"136824 - Oxytropis nigrescens (Pall.) Fisch. ex DC. ssp. nigrescens, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-158661. Accessed 26 Apr. 2025.