This name is a synonym of Cracca ansellii (Hook. f.) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13033343) with original publication details: Niger Fl. 297 1849.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:520385-1.
This name was in version 1 of The Plant List, record tro-13033343, and has not been changed.