This name is a synonym of Symphyotrichum tradescantii (L.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 53806494-62BA-4D9C-880C-8949F79C2AA0) with original publication details: 500 1811.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:180691-1.
This name was in version 1 of The Plant List, record gcc-92744.