listed as synonym of Ranunculus flammula in The Jepson Manual [Ed. 1]; author citation uncertain, Ranunculus flammula var. ovalis (J. M. Bigelow) L. D. Benson in Flora North America, Ranunculus flammula L. var. ovalis (Bigelow) L. D. Benson in The Jepson Manual [Ed. 1], International Plant Names Index-Gray Card Index
Correspondence 1 indicates that Alan T. Whittemore in Flora North America 3:120--121 (1997) recognizes Ranunculus flammula L. var. flammula and Ranunculus flammula L. var. ovalis as occurring in California but cites the tentative nature of the varietal distinctions, especially among western N. Am. populations
Correspondence 2 indicates that this combination is based on Ranunculus filiformis var. ovalis published in Florula Bostoniensis ed. 2:224, 1824, written by Jacob Bigelow (Bigelow in Authors of Plant Names), so that the correct author citation is Ranunculus flammula L. var. ovalis (Bigelow) L. D. Benson
Correspondence 3 indicates that for The Jepson Manual [Ed. 2] Ranunculus flammula L. var. ovalis (Bigelow) L. D. Benson is to be recognized and treated as native to CA.