This name is a synonym of Senna aphylla (Cav.) H.S.Irwin & Barneby.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13002178) with original publication details: Fl. Prov. Buenos Aires 4(3a): 451 1967.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:48276-2.
This name was in version 1 of The Plant List, record tro-13002178, and has not been changed.