This name is a synonym of Euphorbia glyptosperma Engelm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 331402) with original publication details: Amer. Midl. Naturalist 3: 142 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:55280-2.
This name was in version 1 of The Plant List, record kew-331402, and has not been changed.