This name is a synonym of Himatanthus attenuatus (Benth.) Woodson.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 161528) with original publication details: J. Bot. (Hooker) 3: 245 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:203946-2.
This name was in version 1 of The Plant List, record kew-161528.