"Species Details - Ranunculus circinatus Sibth. var. subrigidus (W. B. Drew) L. D. Benson, University of Alberta Vascular Plant Herbarium." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/1-6262/12-121863. Accessed 11 Dec. 2024.
There are 51 specimens of this Species.