This name is a synonym of Micromeria cristata subsp. xylorrhiza (Boiss. & Heldr. ex Benth.) P.H.Davis.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 274056) with original publication details: Prodr. 12: 217 1848.
This name was in version 1 of The Plant List, record kew-274056, and has not been changed.