This name is a synonym of Oreostemma alpigenum var. haydenii (Porter) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E88F415E-22B5-4FD7-9039-BFB95B32F361) with original publication details: Vasc. Pl. Pacific NorthW. 5 76 1955.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23049-2.
This name was in version 1 of The Plant List, record gcc-64602, and has not been changed.