⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-45577, with some changes.
This name is a synonym of Symphyotrichum × tardiflorum (L.).
The record derives from TICA which reports it as a synonym (record 3B6B75D5-A273-4568-861C-547AA467AA95) with original publication details: Rhodora 1 188 1899.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:24190-2.