This name is a synonym of Tanacetum vahlii DC..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record CDF9A964-D678-4E8D-8139-5162A2A715C1).
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 Tanacetum vahlii in version 1 of The Plant List.