Oenothera bistorta Nuttall ex Torrey & A. Gray var. bistorta

Oenothera bistorta Nuttall ex Torrey & A. Gray var. bistorta is a synonym sensu TROPICOS of:

Camissoniopsis bistorta (Nuttall ex Torrey & A. Gray) W.L. Wagner & Hoch, an accepted species name sensu FNA Ed. Comm., 2021.