Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"95782 - Haplopappus squarrosus Hook. & Arn. ssp. grindelioides (DC.) D.D. Keck, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-154446. Accessed 07 May. 2025.