This name is a synonym of Monardella macrantha subsp. hallii (Abrams) Abrams.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 129338) with original publication details: Muhlenbergia 8: 29 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:163372-2.
This name was in version 1 of The Plant List, record kew-129338, and has not been changed.