I just discovered this https://www.wildflower.org/plants/. It is a searchable database of native plants for US. Put in your state and whatever other specifications you want (type of plant like tree, shrub, grass, forb, etc, sun exposure, soil moisture, bloom time) and it pops you up a list of natives for that situation. I put in Ohio and shade and got a list of 459 plants. Since I hadn't specified anything else, it was everything from ferns, wildflowers, grasses to trees. The list gives scientific name, common name, and picture. Then you can click on each one for more information. It was an interesting list with things that are very common, even weeds (lambsquarter) to things I'd never heard of. I will definitely be using it more to help develop my native woodland shade garden. Enjoy!