| | Species and varieties
Oenothera caespitosa (White Evening Primrose, Fragrant Evening Primrose)
Oenothera elata ssp. hookeri (Hooker's Evening Primrose)
Oenothera macrocarpa (Ozark Sundrop, Yellow Evening Primrose)
Oenothera speciosa var. berlandieri (Mexican Evening Primrose)
Oenothera stubbei (Chihuahuan Evening Primrose, Baja evening primrose)
Oenothera tetragona (Sundrops)
Oenothera amoena synonym of Clarkia amoena (Godetia, Farewell-to-Spring)
Oenothera berlandieri synonym of Oenothera speciosa var. berlandieri (Mexican Evening Primrose)
Oenothera biennis var. hookeri synonym of Oenothera elata ssp. hookeri (Hooker's Evening Primrose)
Oenothera drummondii synonym of Oenothera stubbei (Chihuahuan Evening Primrose, Baja evening primrose)
Oenothera hartwegii synonym of Calylophus hartwegii (Sundrop, Sierra Sundrop)
Oenothera hookeri synonym of Oenothera elata ssp. hookeri (Hooker's Evening Primrose)
Oenothera missouriensis synonym of Oenothera macrocarpa (Ozark Sundrop, Yellow Evening Primrose)
Oenothera speciosa synonym of Oenothera speciosa var. berlandieri (Mexican Evening Primrose)
Oenothera speciosa var. childsii synonym of Oenothera speciosa var. berlandieri (Mexican Evening Primrose)
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