This name is a synonym of Andreaea alpina f. compacta (Hook.) Podp..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35103557) with original publication details: Trans. Linn. Soc. London 10(1): 389 1811.
This name was in version 1 of The Plant List, record tro-35103557, and has not been changed.