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) -
Hairy Evening Primrose, Hairy Suncup: Camissonia pubens (Synonym: Oenothera contorta var. pubens, Oenothera pubens, Oenothera strigulosa var. pubens) - Columbia River shoreline about 3 miles east of Arlington, OR.
Sandysoil Suncup: Camissonia strigulosa (Synonym: Oenothera contorta var. epilobioides, Oenothera contorta var. strigulosa, Oenothera strigulosa, Spherostigma strigulosa) - Single collection from The Dalles in May, 1889.
Booth's Evening-primrose, Booth's Mooncup: Eremothera boothii ssp. boothii (Synonyms: Camissonia boothii, Oenothera boothii ssp. alyssoides, Oenothera boothii ssp. boothii)
Small-flowered Evening-primrose, Green River Suncup: Eremothera minor (Synonyms: Camissonia minor, Oenothera minor, Oenothera minor var. cusickii, Sphaerostigma minor)
Blackfoot River Suncup, Obscure Suncup: Neoholmgrenia andina (Synonyms: Camissonia andina, Holmgrenia andina, Oenothera andina)
Long-leaf Evening-primrose, Long-leaved Evening Primrose: Taraxia subacaulis (Synonyms: Camissonia subacaulis, Oenothera heterantha, Oenothera subacaulis)
Tansyleaf Evening Primrose, Tansy-leaf Evening Primrose, Tansy-leaf Evening-primrose: Camissonia tanacetifolia (Synonyms: Camissonia breviflora, Camissonia tanacetifolia, Camissonia tanacetifolia ssp. tanacetifolia, Oenothera breviflora, Oenothera tanacetiflia, Taraxia breviflora, Camissonia tanacetifolia ssp. tanacetifolia) -