Camissoniopsis bistorta (Nutt. ex Torr. & A. Gray) W.L. Wagner & Hoch  

Family: Onagraceae

southern suncup, more...southern suncup

[Camissonia bistorta (Nutt. ex Torr. & A. Gray) P.H. Raven, moreOenothera bistorta Nutt. ex Torr. & A. Gray, Oenothera bistorta var. veitchiana Hook.]