This name is a synonym of Diogenesia laxa (A.C.Sm.) Sleumer.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 12303717) with original publication details: Notizbl. Bot. Gart. Berlin-Dahlem 13(116): 137 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:262086-2.
This name was in version 1 of The Plant List, record tro-12303717, and has not been changed.