This name is a synonym of Ranunculus delphinifolius f. terrestris (A. Gray) S.F. Blake.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50089809) with original publication details: Ann. Rep. Comm. Parks Detroit 11: 63 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:217253-2.
This name was in version 1 of The Plant List, record tro-50089809.