This name is a synonym of Euphorbia alainii Oudejans.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 38115) with original publication details: Moscosoa 1: 25 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:55350-2.
This name was in version 1 of The Plant List, record kew-38115, and has not been changed.