This name is a synonym of Plantago lamprophylla Pilg..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25200218) with original publication details: Bull. Soc. Bot. Genève 2(14): 181, f. 14 1923.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:201317-2.
This name was in version 1 of The Plant List, record tro-25200218, and has not been changed.