Oenothera speciosa

Family: Onagraceae
Common Names: Buttercups, Pink Evening Primrose, Showy Evening Primrose, Mexican Evening Primrose, Showy Primrose, Pink Ladies, Pink Buttercups

Native to USA: AL, AR, AZ, CA, CT, FL, GA, IA, IL, IN, KS, KY, LA, MO, MS, NC, NE, NM, OH, OK, PA, SC, TN, TX, UT, VA, WV 

A hardy drought resistant plant that can form large colonies. Makes a good ground cover for sunny areas. Showy Evening Primrose is a good nectar source and seeds attract birds.