This name is a synonym of Rhodiola pachyclados (Aitch. & Hemsl.) H. Ohba.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8903201) with original publication details: J. Linn. Soc., Bot. 18: 58 1880.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:275805-1.
This name was in version 1 of The Plant List, record tro-8903201, and has not been changed.