This name is a synonym of Brachythecium buchananii (Hook.) A. Jaeger.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35104583) with original publication details: J. Proc. Linn. Soc., Bot., Suppl. 1: 78 1859.
This name was in version 1 of The Plant List, record tro-35104583.