This name is a synonym of Symphyotrichum lanceolatum var. hesperium (A.Gray) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B81B81B0-EF41-4773-AD6C-F6759B37D069) with original publication details: Bull. Torrey Bot. Club 25 119 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23544-2.
This name was in version 1 of The Plant List, record gcc-71462.