This name is a synonym of Rhipsalis floccosa subsp. pittieri (Britton & Rose) Barthlott & N.P.Taylor.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Cact. 4: 233 1923.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:308210-2.
This name was in version 1 of The Plant List, record kew-2417447, and has not been changed.