This name is a synonym of Impatiens longicalcarata (G.M. Schulze & Wilczek) Grey-Wilson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50264638) with original publication details: Bull. Jard. Bot. État Brux. 29: 188 1959.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60436044-2.
This name was in version 1 of The Plant List, record tro-50264638, and has not been changed.