This name is a synonym of Rhodiola rosea subsp. tachiroi (Franch. & Sav.) Jacobsen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50002417) with original publication details: Enum. Pl. Jap. 2(2): 366 1878.
This name was in version 1 of The Plant List, record tro-50002417.