This name is a synonym of Symphyotrichum ontarionis .
The record derives from TICA
(data supplied on )
which reports it as a synonym (record 469D20F9-0C24-4F1D-A18C-D95004EDE97E
) with original publication details: 1931.
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Aster pantotrichus in version 1 of The Plant List.