This name is a synonym of Symphyotrichum fontinale (Alexander) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 95514BC7-9440-49C5-9D1B-CF602C04A0A8) with original publication details: "1382, 1509" 1933.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:307400-2.
This name was in version 1 of The Plant List, record gcc-123862, and has not been changed.