This name is a synonym of Haenianthus incrassatus (Sw.) Griseb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 367430) with original publication details: Prodr. Veg. Ind. Occ. 13 1788.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:56619-2.
This name was in version 1 of The Plant List, record kew-367430, and has not been changed.