This name is a synonym of Agastache rupestris (Greene) Standl..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 24733) with original publication details: Muhlenbergia 1: 4 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:36598-2.
This name was in version 1 of The Plant List, record kew-24733, and has not been changed.