Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"73069 - Helianthus nuttallii Torr. & A. Gray ssp. canadensis Long, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-154644. Accessed 04 Dec. 2024.