This name is a synonym of Metzgeria fruticulosa (Dicks.) A. Evans.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35190001) with original publication details: Index Bryol. (ed. 2) 1785.
This name was in version 1 of The Plant List, record tro-35190001, and has not been changed.