This name is a synonym of Rhaponticum longifolium subsp. ericeticola (Font Quer) Greuter.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9F277114-A8FF-49BB-A6A3-03F50DDD988C) with original publication details: Iter Marocc.: 704 (1932) 704 1932.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:70029207-1.
This name was in version 1 of The Plant List, record gcc-2198, and has not been changed.