This name is a synonym of Gymnostoma nobile (Whitmore) L.A.S.Johnson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50219131) with original publication details: J. Adelaide Bot. Gard. 6(1): 84 1982.
This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Gymnostoma nobilis in version 1 of The Plant List.