This name is a synonym of Euphorbia chaetocalyx (Boiss.) Tidestr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 331398) with original publication details: Field & Lab. 17: 70 1949.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:55267-2.
This name was in version 1 of The Plant List, record kew-331398.