Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"16644 - Antennaria howellii Greene ssp. canadensis (Greene) R. J. Bayer, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-126096. Accessed 13 Mar. 2025.