My favorite native American wildflower is the purple coneflower. They are so beautiful and so easy to grow, no garden should be without at least one clump of them. I always grow mine from seed and have never had to buy a single plant. They do really well in Ohio clay and just glow despite the heat and sun of late summer.
I only grow the species, Echinacea purpurea, and none of the frou-frou hybrids. Anyone who knows me knows I wouldn't be caught dead with hybrids in my garden. Yes, I'm a plant snob.
This little spot of wildflowers follows the curve of the driveway. A white birch is to the left and is already 8 feet tall after only 2 years! This little bird house was our first project when we moved in three years ago. I love it. Tree swallows successfully raised their young in it this spring and it is currently inhabited by a large group of paper wasps, which are welcome in my garden because they are one of nature's best organic pesticides! I often weed within one foot of the bird house and they never bother me. I've even supported myself by grabbing the wooden post but they seem to know that I mean them no harm and they ignore me. I often find myself extolling the virtues of wasps as a gardener's friends to those who fear them. Mud daubers are equally good at killing insects, although they specialize in killing only spiders which they place in the cells of their nests for their larvae to feed on. Gruesome, but true!