Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"117452 - Urtica dioica L. var. procera (Muhl. ex Willd.) Wedd., University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-81746. Accessed 20 May. 2024.