This name is a synonym of Aretiastrum aretioides (Kunth) Graebn..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 33500163) with original publication details: Gen. Sp. Pl. 3: 324 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:286613-2.
This name was in version 1 of The Plant List, record tro-33500163, and has not been changed.