This name is a synonym of Oncidium constrictum (Lindl.) Beer.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 336018) with original publication details: Man. Orchid. Pl. 1: 20 1887.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:172248-2.
This name was in version 1 of The Plant List, record kew-336018.