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 31430) with original publication details: Hort. Brit. ed. 2: 209 1830.
This name was in version 1 of The Plant List, record kew-31430, and has not been changed.