This name is a synonym of Ranunculus pyrenaeus subsp. angustifolius (DC.) Rouy & Foucaud.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Rapp. Voy. Bot. 1: 78 1808.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:712212-1.
This name was in version 1 of The Plant List, record kew-2524178, and has not been changed.