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 13027982) with original publication details: Gen. Cass. Syn. 17 1837.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:484360-1.
This name was in version 1 of The Plant List, record tro-13027982.