This name is a synonym of Himatanthus attenuatus var. malongo (Müll.Arg.) Plumel.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 161529) with original publication details: Fl. Bras. 6(1): 42 1860.
This name was in version 1 of The Plant List, record kew-161529.