This name is a synonym of Xylorhiza tortifolia (Torr. & A.Gray) Greene.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 141A7C06-C63E-4D17-A166-78AC4988FE70) with original publication details: Contr. U. S. Natl. Herb. 25 562 1925.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23010-2.
This name was in version 1 of The Plant List, record gcc-85442.