This name is a synonym of Banksia spinulosa var. cunninghamii (Sieber ex Rchb.) A.S.George.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name with original publication details: Prodr. 14: 454 1856.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:703123-1.
This name was in version 1 of The Plant List, record kew-2669137, and has not been changed.