This name is a synonym of Artemisia ludoviciana Nutt..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record FD9B55CB-2D02-454A-A2CE-878C7F1782B7) with original publication details: 420 1843.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:20685-2.
This name was in version 1 of The Plant List, record gcc-57592.