This name is a synonym of Malacocarpus leninghausii (F. Haage ex K. Schum.) Britton & Rose.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50185548) with original publication details: Monatsschr. Kakteenk. 5: 147 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:137708-1.
This name was in version 1 of The Plant List, record tro-50185548, and has not been changed.