This name is a synonym of Euphorbia albomarginata Torr. & A.Gray.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 37999) with original publication details: Fl. S.E. U.S. ed. 2: 1349 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:340657-1.
This name was in version 1 of The Plant List, record kew-37999, and has not been changed.