The Genus Oenothera

Contorted Pod Evening Primrose, Contorted Pod Suncup, Plains Evening-primrose, Slender Evening Primrose, Twisted Suncup: Camissonia contorta (Synonyms: Oenothera contorta, Oenothera contorta var. contorta, Oenothera cruciata (illeg.), Oenothera dentata) -

Tansyleaf Evening Primrose, Tansy-leaf Evening Primrose, Tansy-leaf Evening-primrose: Camissonia tanacetifolia ssp. tanacetifolia (Synonym: Oenothera tanacetifolia) -

Desert Eveningprimrose, Desert Evening-primrose, Fragrant Evening Primrose, Sand Lily, Tufted Evening Primrose, Tufted Evening-primrose: Oenothera caespitosa ssp. caespitosa (Synonyms: Oenothera caespitosa ssp. montana, Oenothera caespitosa ssp. purpurea, Oenothera caespitosa var. caespitosa, Oenothera caespitosa var. montana, Oenothera caespitosa var. purpurea, Oenothera cespitosa ssp. cespitosa, Oenothera cespitosa ssp. montana, Oenothera cespitosa ssp. purpurea, Oenothera cespitosa var. montana, Oenothera cespitosa var. purpurea, Pachylophis caespitosus, Pachylophis cespitosus, Pachylophis montanus) -

Tufted Evening Primrose: Oenothera cespitosa ssp. marginata (Synonyms: Oenothera caespitosa ssp. marginata, Oenothera caespitosa var. marginata, Oenothera cespitosa var. marginata) - ?

Hooker's Evening-primrose, Hooker's Evening Primrose, Western Evening Primrose: Oenothera elata ssp. hirsutissima (Synonyms: Oenothera biennis var. hirsutissima, Oenothera elata ssp. texensis, Oenothera elata var. hirsutissima, Oenothera hookeri ssp. angustifolia, Oenothera hookeri ssp. grisea, Oenothera hookeri ssp. hewettii, Oenothera hookeri ssp. hirsutissima, Oenothera hookeri ssp. ornata, Oenothera hookeri ssp. venusta, Oenothera hookeri var. angustifolia, Oenothera hookeri var. hewettii, Oenothera hookeri var. hirsutissima, Oenothera hookeri var. ornata, Oenothera ornata, Oenothera simsiana) -

Long-tubed Evening-primrose, Yellow Evening-primrose, Yellow Evening Primrose: Oenothera flava ssp. flava (Synonym: Lavauxia flava, Oenothera flava) - ?

Redsepal Evening Primrose, Red-sepal Evening-primrose: Oenothera glazioviana (Synonym: Oenothera erythrosepala, Oenothera xerythrosepala, Oenothera lamarckiana) - ?

Pale Evening Primrose, Pale Evening-primrose, Whitestem Evening-primrose: Oenothera pallida ssp. pallida (Synonyms: Oenothera pallida, Oenothera pallida var. idahoensis, Oenothera pallida var. pallida, Oenothera pallida var. typica) -

Common Evening-primrose, Common Evening Primrose, Hairy Evening-primrose, Hairy Evening Primrose, Villous Evening-primrose: Oenothera villosa ssp. strigosa (Synonyms: Oenothera biennis var. strigosa, Oenothera cheradophila, Oenothera depressa ssp. strigosa, Oenothera procera, Oenothera rydbergii, Oenothera strigosa, Oenothera strigosa ssp. cheradophila, Oenothera vilosa ssp. cheradophila, Oenothera villosa var. strigosa) -