This name is a synonym of Chylismia megalantha (Munz) W.L.Wagner & Hoch.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50082424) with original publication details: Univ. Calif. Publ. Bot. 34(1): 111 1962.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:173172-2.
This name was in version 1 of The Plant List, record tro-50082424, and has not been changed.