This name is a synonym of Daphnopsis americana subsp. salicifolia (Kunth) Nevling.
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: 522 1857.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:831470-1.
This name was in version 1 of The Plant List, record kew-2757453, and has not been changed.