Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"139533 - Symphyotrichum lanceolatum (Willd.) G. L. Nesom var. hesperium (A. Gray) G. L. Nesom, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-160932. Accessed 24 Apr. 2025.