Dryopteris intermedia - Fancy Fern, Toothed Woodfern - Bareroot Bargain Bin
This fern is usually evergreen except in real cold climates. Its fronds are finely cut giving it a lacy delicate look and they are a dark green. Often used by florist for greenery. The soil must be rich and humus and not allowed to dry out. It grows in a clump and does not spread by runners so it works well when mixed in with your other wildflowers.
Shade, Rich Moist Soil, 2-3 ft Tall, Zones 3-8