This name is a synonym of Rhodiola macrocarpa (Praeger) S.H. Fu.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8903352) with original publication details: Notizbl. Bot. Gart. Berlin-Dahlem 10(99): 887 1930.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:275881-1.
This name was in version 1 of The Plant List, record tro-8903352, and has not been changed.