This name is a synonym of Acmispon americanus (Nutt.) Rydb..
The record derives from ILDIS
(data supplied on 2010-07-14)
which reports it as a synonym (record
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1107555-2.
This name was in version 1 of The Plant List, record ild-41098.