This name is a synonym of Helosis cayennensis var. mexicana (Liebm.) B.Hansen.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 3000077) with original publication details: Fl. Bras. 4(2): 23 1869.
This name was in version 1 of The Plant List, record tro-3000077, and has not been changed.