This name is a synonym of Racosperma disparrimum subsp. calidestre (M.W. McDonald & Maslin) Pedley.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50247093) with original publication details: Austral. Syst. Bot. 13: 52 2000.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1013196-1.
This name was in version 1 of The Plant List, record tro-50247093, and has not been changed.