Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"54684 - Helianthus annuus L. ssp. lenticularis (Douglas ex Lindl.) Cockerell, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-154539. Accessed 21 Mar. 2025.