Family: Onagraceae
[Calylophus hartwegii subsp. filifolius (Eastw.) Towner & P.H.Raven, more..., Calylophus hartwegii var. filifolius (Eastw.) Shinners, Oenothera filifolia (Eastw.) Tidestr., Oenothera hartwegii var. filifolia (Eastw.) Munz, Oenothera tubicula var. filifolia Eastw.]