This name is a synonym of Calyptranthes pallens var. williamsii (Standl.) McVaugh.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 32643) with original publication details: Ceiba 1: 156 1950.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:43455-2.
This name was in version 1 of The Plant List, record kew-32643, and has not been changed.