This name is a synonym of Chylismia claviformis subsp. integrior (P.H.Raven) W.L.Wagner & Hoch.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 23201417) with original publication details: Proc. Amer. Acad. Arts 8: 295 1870.
This name was in version 1 of The Plant List, record tro-23201417.