This name is a synonym of Phoradendron berteroanum (DC.) Griseb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50244667) with original publication details: Phoradendron 161, f. 245 1916.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:194118-2.
This name was in version 1 of The Plant List, record tro-50244667.