This name is a synonym of Plantago galapagensis Rahn.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25200541) with original publication details: Madroño 20: 252 1970.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:201486-2.
This name was in version 1 of The Plant List, record tro-25200541, and has not been changed.