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 324068) with original publication details: Anales Soc. Ci. Argent. 65: 301 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:247107-2.
This name was in version 1 of The Plant List, record kew-324068.