Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"54832 - Clematis occidentalis (Hornem.) DC. var. grosseserrata (Rydb.) Pringle, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-106885. Accessed 09 Jan. 2025.