This name is a synonym of Frangula californica subsp. tomentella (Benth.) Kartesz & Gandhi.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100355803) with original publication details: Zoë 1(8): 244 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:219053-2.
This name was in version 1 of The Plant List, record tro-100355803, and has not been changed.