Note that Evening-primrose can also be spelled evening primrose.
Common Evening Primrose, Eastern Evening Primrose, King's-cureall: Oenothera biennis - Naturalized.
Red-sepaled Evening Primrose: Oenothera glazioviana (Synonym: Oenothera xerythrosepala) - Naturalized.
Villous Evening Primrose: Oenothera villosa ssp. strigosa (Synonyms: Oenothera rydbergii, Oenothera strigosa) - Native.