Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"61480 - Ptelea baldwinii Torr. & A. Gray var. crenulata (Greene) Jeps., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-84900. Accessed 28 Feb. 2025.