This name is a synonym of Ranunculus glaberrimus var. ellipticus (Greene) Greene.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27103164) with original publication details: Pittonia 2(9): 110–111 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:217262-2.
This name was in version 1 of The Plant List, record tro-27103164.