This name is a synonym of Acrolasia gracilenta (Torr. & A.Gray) Rydb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50088151) with original publication details: Botany (Fortieth Parallel) 115 1871.
⥇ A cross-taxon basionym link was ignored while processing this record,
see Mentzelia gracilenta Torr. & A. Gray.
This name was in version 1 of The Plant List, record tro-50088151.