This name is a synonym of Dendrobium sarcochilus var. megalorhizum (Kraenzl.) N.Hallé.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 58364) with original publication details: Vierteljahrsschr. Naturf. Ges. Zürich 74: 85 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:627964-1.
This name was in version 1 of The Plant List, record kew-58364, and has not been changed.