In the pasture we have black eyed susan, blue vervain, moth mullein (a new flower to me, delicate and pretty), daisy fleabane, grayhead prairie coneflower , and others. This is a good site to get a wildflower fix:
http://citnews.unl.edu/florasearch/p...?id=1002556732

One flower I don't have, and really really want is butterfly milkweed.

http://citnews.unl.edu/florasearch/p...1002553886http

We had a lot of rain this year and the grass is tall. It's worth all the chiggers and ticks to wade through this year's deep grass and visit the flowers.