This name is a synonym of Euphorbia serpyllifolia subsp. hirtula (Engelm. ex S.Watson) Oudejans.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 38239) with original publication details: Madroño 32: 188 1985.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:924155-1.
This name was in version 1 of The Plant List, record kew-38239.