This name is a synonym of Achillea erba-rotta subsp. rupestris (Porta) I.Richardson.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 8B3C3EB1-0FD3-476C-942D-1185507EE1DC) with original publication details: 1879.
This name was in version 1 of The Plant List, record gcc-9382, and has not been changed.