Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"12042 - Oxytropis nigrescens (Pall.) Fisch. ex DC. var. uniflora (Hook.) Barneby, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-103023. Accessed 22 May. 2025.