Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"18159 - 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/12-154529. Accessed 03 Apr. 2025.