This name is a synonym of Achillea erba-rotta All..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 05BFB860-BADC-40AD-97CD-C84118BBAED7).
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 Achillea erba-rotta in version 1 of The Plant List.