Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"74025 - 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/12-106980. Accessed 08 Jan. 2025.