This name is a synonym of Monardella nana subsp. leptosiphon (Torr.) Abrams.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 129409) with original publication details: Rep. U.S. Mex. Bound. 2(1): 2(1): 1858.
This name was in version 1 of The Plant List, record kew-129409, and has not been changed.