This name is a synonym of Rhodiola crassipes var. stephanii (Schltdl.) Jacobsen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50001271) with original publication details: Linnaea 6: 549 1831.
This name was in version 1 of The Plant List, record tro-50001271.