This name is a synonym of Rhamnus smithii subsp. fasciculata (Greene) C.B. Wolf.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50317078) with original publication details: Leafl. Bot. Observ. Crit. 1(4): 63 1904.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:218999-2.
This name was in version 1 of The Plant List, record tro-50317078.