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 126420) with original publication details: Bot. Cult. ed. 2, 5: 380 1811.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:598223-1.
This name was in version 1 of The Plant List, record kew-126420, and has not been changed.