Canadensys: University of Alberta Vascular Plant Herbarium (ALTA-VP)
Canadensys, operated from the Université de Montréal Biodiversity Centre
"18509 - Ratibida columnifera (Nutt.) Wooton & Standl. var. pulcherrima (DC.) D. J. N. Hind, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/12-164926. Accessed 14 Dec. 2024.