This name is a synonym of Hesperolinon congestum (A. Gray) Small.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 18700198) with original publication details: Proc. Amer. Acad. Arts 6: 521 1865.
This name was in version 1 of The Plant List, record tro-18700198, and has not been changed.