I cut the pinecones apart and was able to make the what looks like a flower. The larger pinecones are from northern Wisconsin; the smaller round spiky one is from the Keys in Florida.
In order to get the pinecones to lay flat on the frame, I cut the back of the cone off so it was flat. Worked really nice. I also used hot glue to attached everything to the frame. Below is a video I made with more details about how I put this together.