This name is a synonym of Banksia spinulosa var. cunninghamii (Sieber ex Rchb.) A.S.George.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50205745) with original publication details: Syst. Veg. 4: Curae Posteriores 47 1827.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:703086-1.
This name was in version 1 of The Plant List, record tro-50205745, and has not been changed.