⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-78959, and has not been changed.
This name is a synonym of Euphorbia capitellata Engelm..
The record derives from WCSP which reports it as a synonym (record 78959) with original publication details: Proc. Calif. Acad. Sci. IV, 12: 1066 1924.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:101404-2.