This name is a synonym of Utricularia welwitschii var. odontosepala (Stapf) P. Taylor.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 18300344) with original publication details: Bull. Misc. Inform. Kew 1912: 331 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:526967-1.
This name was in version 1 of The Plant List, record tro-18300344, and has not been changed.