This name is a synonym of Sambucus racemosa var. leucocarpa (Torr. & A. Gray) Cronquist.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50325330) with original publication details: Fl. N. Amer. 2: 13 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:227196-2.
This name was in version 1 of The Plant List, record tro-50325330.