This name is a synonym of Pittosporum tenuifolium subsp. colensoi (Hook. f.) Kirk.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25100150) with original publication details: Stud. Fl. New Zealand 47 1899.
This name was in version 1 of The Plant List, record tro-25100150.