Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"104994 - Potamogeton filiformis Pers. var. borealis (Raf.) H. St. John, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-12775. Accessed 06 Jan. 2025.