This name is a synonym of Olsynium filifolium (Gaudich.) Goldblatt.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 324892) with original publication details: Sp. Pl. 2: 505 1833.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:441067-1.
This name was in version 1 of The Plant List, record kew-324892.