Field bindweed is a vine that is blooming at Springbrook Nature Center now. Gardeners think it is a real pest plant, but it has a very pretty flower. Each flower only blooms for one day, and they open early in the morning, which is when I took these pictures yeaterday.
I think the flower looks like something Georgia O'Keeffe would have painted.
As I took the picture of the bumblebee leaving the flower below, I was surprised later to notice the green tree frog in the upper right of the picture. I didn't see it when I was there!