This name is a synonym of Rhododendron lapponicum (L.) Wahlenb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12302425) with original publication details: Nouv. Mém. Soc. Imp. Naturalistes Moscou 9: 237 1834.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:333051-1.
This name was in version 1 of The Plant List, record tro-12302425.