This name is a synonym of Rosularia rosulata (Edgew.) H. Ohba.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 8903068) with original publication details: Trans. Linn. Soc. London 20: 48 1846.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:275975-1.
This name was in version 1 of The Plant List, record tro-8903068.