This name is a synonym of Clermontia oblongifolia subsp. mauiensis (Rock) Lammers.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 367719) with original publication details: Indig. Trees Haw. Isl. 476 1913.
This name was in version 1 of The Plant List, record kew-367719, and has not been changed.