This name is a synonym of Thibaudia diphylla Dunal.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12300908) with original publication details: Gard. Chron. 7 1848.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:858995-1.
This name was in version 1 of The Plant List, record tro-12300908, and has not been changed.