This name is a synonym of Ranunculus sieboldii Miq..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50118633) with original publication details: Fl. Ryukyus 279 1971.
This name was in version 1 of The Plant List, record tro-50118633, and has not been changed.