This name is a synonym of Euthamia leptocephala (Torr. & A.Gray) Greene ex Porter & Britton.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record ECF0034A-D6D9-42DD-9105-B97F37EBB2AB) with original publication details: Revis. Gen. Pl. 1: 318 318 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23670-2.
This name was in version 1 of The Plant List, record gcc-114291, and has not been changed.