Glad I took the pix. The blooms only lasted one day and I don't think they rebloom.
It grows new lobes - or leaves - one time per year. Dh and I noticed some of the new lobes looked odd-shaped. Those were actually the flower buds.
Now we know.
I had no idea prickly pear could bloom in Ohio, much less what to expect if they did. Pretty flower for a cactus I thought.