| Oenothera
biennis
L. common evening primrose Native |
                                      
|
| Oenothera
oakesiana
(Gray) J.W. Robbins ex S. Wats. et Coult. = O. angustissima R.R. Gates = O. biennis var. oakesiana Gray Oakes' evening primrose Native |
                   
|
| Oenothera
parviflora
L. small-flowered evening-primrose Native |
        
|
| Oenothera
perennis
L. little sundrops Native |
          
|
| Oenothera
pilosella
Raf. hairy sundrops Introduced |
 
|