This name is a synonym of Plantago australis subsp. sodiroana (Pilg.) Rahn.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bot. Jahrb. Syst. 25: 733 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:201563-2.
This name was in version 1 of The Plant List, record kew-2570745.