This name is a synonym of Orthotrichum lyellii Hook. & Taylor.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35173552) with original publication details: Musci Bor.-Amer. (ed. 2) 33 1864.
This name was in version 1 of The Plant List, record tro-35173552.