This name is a synonym of Haplopappus diplopappus J.Rémy.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9CC8870E-B6D8-436E-978D-5D93A6FA29A4) with original publication details: Revis. Gen. Pl. 1 318 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23318-2.
This name was in version 1 of The Plant List, record gcc-50475.