This name is a synonym of Euphorbia perennans (Shinners) Warnock & M.C.Johnst..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 38159) with original publication details: Field & Lab. 24: 38 1956.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:55375-2.
This name was in version 1 of The Plant List, record kew-38159, and has not been changed.