This name is a synonym of Rhodiola imbricata Edgew..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50313746) with original publication details: Ann. Bot. Syst. 1: 325 1848.
This name was in version 1 of The Plant List, record tro-50313746, and has not been changed.