Cleland's evening primrose, Oenothera clelandii

What's wrong with this picture? Evening primroses have four corolla lobes. In this population some flowers have more. Most flowers, even on the same plant are normal. The extra flower parts are probably caused by disease, or predator damage to the buds. But it makes a nice picture? Cleland's evening-primrose is easy to identify because of the somewhat pointed lobes. All but one other species have rounded corolla lobes. That species, O. rhombipetala, has larger flowers and pistils noticeably longer than the stamens. Cleland's evening-primrose grows in dry, often sandy areas in AR, IA, IL, IN, KY, MI, MN, MO, NJ, NY, VA, WI, and ON. Or maybe no longer in Ontario. I met a botanists this weekend who said they have been unable to find any recently.
Oak Openings region, Lucas Co OH, 7/28/22. Willowherb family, Onagraceae.