This name is a synonym of Ranunculus macounii Britton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27101524) with original publication details: Minnesota Bot. Stud. 2: 469 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:217418-2.
This name was in version 1 of The Plant List, record tro-27101524.