This name is a synonym of Haplopappus meyenii Walp..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 3B0061BF-CD5C-4BBE-A3D1-351E8E34DB23) 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:23751-2.
This name was in version 1 of The Plant List, record gcc-28728, and has not been changed.