This name is a synonym of Cracca rigida (Baker) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13033557) with original publication details: Fl. Trop. Afr. 2: 114 1871.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:520870-1.
This name was in version 1 of The Plant List, record tro-13033557, and has not been changed.