This name is a synonym of Allium bisceptrum S.Watson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 295140) with original publication details: Intermountain Fl. 6: 515 1977.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8689-2.
This name was in version 1 of The Plant List, record kew-295140.