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 31508) with original publication details: Prodr. 3: 224 1828.
This name was in version 1 of The Plant List, record kew-31508, and has not been changed.