This name is a synonym of Xylorhiza cognata (H.M.Hall) T.J.Watson.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record A16CB171-6BBE-4873-8342-84917657CF47) with original publication details: Univ. Calif. Publ. Bot. 6 173 1915.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23232-2.
This name was in version 1 of The Plant List, record gcc-90653, and has not been changed.