This name is a synonym of Senna obtusifolia (L.) H.S.Irwin & Barneby.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13028587) with original publication details: Gen. Hist. 2: 452 1832.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:486009-1.
This name was in version 1 of The Plant List, record tro-13028587.