This name is a synonym of Allium atrorubens var. cristatum (S.Watson) McNeal.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 295365) with original publication details: Proc. Amer. Acad. Arts 14: 232 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8734-2.
This name was in version 1 of The Plant List, record kew-295365, and has not been changed.