This name is a synonym of Ranunculus bonariensis Poir..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27101849) with original publication details: Bull. Herb. Boissier 6(1): 10 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:217104-2.
This name was in version 1 of The Plant List, record tro-27101849.