This name is a synonym of Oncidium altissimum (Jacq.) Sw..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 53083) with original publication details: Nova Acta Regiae Soc. Sci. Upsal. 6: 74 1799.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:624937-1.
This name was in version 1 of The Plant List, record kew-53083, and has not been changed.