This name is a synonym of Utricularia tridentata Sylvén.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50188012) with original publication details: Escr. Larrañaga 2: 15 1923.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:260841-2.
This name was in version 1 of The Plant List, record tro-50188012, and has not been changed.