This name is a synonym of Dryandra sessilis var. cygnorum (Gand.) A.S.George.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Austral. Syst. Bot. 20: 70 2007.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77080614-1.
This name was in version 1 of The Plant List, record kew-2603737, and has not been changed.