This name is a synonym of Dioon edule Lindl..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 383580) with original publication details: Ill. Hort. 2(Misc.): 92 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:297054-1.
This name was in version 1 of The Plant List, record kew-2768997.