Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"130190 - Potentilla gracilis Douglas ex Hook. var. fastigiata (Nuttall) S. Watson, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-115113. Accessed 16 Jun. 2025.