This name is a synonym of Nothochelone nemorosa (Douglas ex Lindl.) Straw.
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: Bull. Sci. Acad. Imp. Sci. Saint-Pétersbourg 5: 345 1839.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:808203-1.
This name was in version 1 of The Plant List, record kew-2550516, and has not been changed.