This name is a synonym of Agoseris heterophylla (Nutt.) Greene.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an invalid name (record 06133E74-C2E3-460E-A9B9-6A9BC9ABCD90) with original publication details: 493 1843.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:227714-1.
This name was in version 1 of The Plant List, record gcc-79056.