This name is a synonym of Riccardia chamedryfolia f. major (Lindb.) Schljakov.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35204247) with original publication details: Stud. Handb. Brit. Hepat. (ed. 2) 55 1926.
This name was in version 1 of The Plant List, record tro-35204247, and has not been changed.