This name is a synonym of Phoradendron robustissimum Eichler.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 19102750) with original publication details: Phoradendron 78–79, t. 102 1916.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:194231-2.
This name was in version 1 of The Plant List, record tro-19102750.