This name is a synonym of Riccardia flagellaris (A. Gepp) H.A. Mill..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35202303) with original publication details: J. Linn. Soc., Bot. 39: 194 1909.
This name was in version 1 of The Plant List, record tro-35202303, and has not been changed.