This name is a synonym of Cleisostoma williamsonii (Rchb.f.) Garay.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 41943) with original publication details: Bot. Mus. Leafl. 23: 174 1972.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:623541-1.
This name was in version 1 of The Plant List, record kew-41943, and has not been changed.