This name is a synonym of Impatiens burtonii var. angusticalcarata (De Wild.) R. Wilczek & G.M. Schulze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50136504) with original publication details: Pl. Bequaert. 1: 352 1922.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:103452-1.
This name was in version 1 of The Plant List, record tro-50136504, and has not been changed.