Keep in mind that "going native" in your landscaping doesn't mean taking plants from the wild. Even if you remove a common plant from the wild, you may unknowingly be disturbing other species that might not grow there again for a century. When you dig a plant from the wild, you may also bring problems, such as poison ivy roots, into your garden in the soil around the wild plant's roots.
Instead of digging plants form the wild, find out how you can buy nursery-propogated native plants. One good way to get information is to contact your state native plant or wildflower society.