I have been collecting pieces of the local flora from some of my recent trips... I had ferns from the Oregon coast, autumn leaves from Asheville, and some autumn leaves from Alabama as well. I wanted to find a way to display them, this was perfect and so easy too!
flower seed paper (I got mine from this shop)
picture frames of your choice (mine were about $1 each from Walmart)
pressed leaves/flowers/ferns (press them for about a week under heavy books between wax paper)
Cut the seed paper to fit inside the photo frames. Arrange botanicals how you want them on seed paper and lay picture frame glass on top. Carefully load glass and paper into frame, and that's it! (almost) instant art!