This name is a synonym of Daphnopsis americana (Mill.) J.R.Johnst..
The record derives from WCSP (in review)
(data supplied on 2012-03-26)
which reports it as a synonym with original publication details: Prodr. 14: 523 1857.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:831442-1.
This name was in version 1 of The Plant List, record kew-2757419.