Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"17372 - Aster hesperius A. Gray var. laetevirens (Greene) Cronquist, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-149652. Accessed 26 Mar. 2025.