This name is a synonym of Callistemon speciosus (Sims) Sweet.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 123807) with original publication details: Hortus Kew. 4: 410 1812.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:598044-1.
This name was in version 1 of The Plant List, record kew-123807, and has not been changed.