This name is a synonym of Ranunculus serpens subsp. polyanthemophyllus (W.Koch & H.E.Hess) Kerguélen.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Ber. Schweiz. Bot. Ges. 65: 280 1955.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:713552-1.
This name was in version 1 of The Plant List, record kew-2527046, and has not been changed.