Ranunculus subg. Cyrtorhyncha
in A. Gray et al., Syn. Fl. N. Amer. 1: 23. 1895.
Basionym: Undefined subg. Cyrtorhyncha Nuttall in J. Torrey and A. Gray, Fl. N. Amer. 1: 26. 1838
Treatment appears in FNA Volume 3. Treatment on page 125.
in A. Gray et al., Syn. Fl. N. Amer. 1: 23. 1895.