This name is a synonym of Ungernia oligostroma Popov & Vved..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 290672) with original publication details: Fl. URSS 4: 484 1935.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:66975-1.
This name was in version 1 of The Plant List, record kew-290672, and has not been changed.