The Evening-primroses and Suncups of the Cascade Mountains of Oregon and Washington

The Genera Camissonia and Taraxia

formerly The Genus Oenothera

Contorted Pod Evening Primrose, Contorted Pod Suncup, Slender Evening Primrose, Twisted Suncup: Camissonia contorta (Synonyms: Oenothera contorta, Oenothera contorta var. contorta, Sphaerostigma contortum) -

Hilgard's Evening Primrose, Hilgard's Suncup: Neoholmgrenia hilgardii (Synonyms: Camissonia hilgardii, Holmgrenia hilgardii, Oenothera andina var. hilgardii, Oenothera contorta, Oenothera contorta var. hilgardii, Oenothera hilgardii) -

Diffuseflower Evening-primrose, Long-leaf Evening-primrose, Long-leaved Evening Primrose: Taraxia subacaulis (Synonyms: Camissonia subacaulis, Oenothera heterantha, Oenothera subacaulis) -

Tansy-leaf Evening Primrose: Taraxia tanacetifolia (Synonyms: Camissonia breviflora, Camissonia tanacetifolia, Camissonia tanacetifolia ssp. tanacetifolia, Oenothera breviflora, Oenothera tanacetifolia, Taraxia breviflora, Taraxia tanacetifolia ssp. tanacetifolia) -

Hill Suncup Slender-flowered Evening Primrose: Tetrapteron graciliflorum (Synonyms: Camissonia graciliflora, Oenothera graciliflora)