This name is a synonym of Plantago heterophylla Nutt..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25200527) with original publication details: Symb. Fl. Argent. 221 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:684870-1.
This name was in version 1 of The Plant List, record tro-25200527, and has not been changed.