This name is a synonym of Drymocallis rupestris (L.) Soj k.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 14194) with original publication details: Flore fran‡oise Flore fran‡oise; 1779 120 1779.
This name record (from RJP) 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 Argentina rupestris in version 1 of The Plant List.