This name is a synonym of Cortaderia pilosa (d'Urv.) Hack..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 406413) with original publication details: Ann. Sci. Observ. 3: 110 1830.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:397113-1.
This name was in version 1 of The Plant List, record kew-406413.