When I was a kid my uncle, who had a farm in western Kansas, showed me a dried seed pod that he called "devil's claw". As I recall, it was similar to a milkweed pod only the end of the pod had a long thorn like thing that curled. When the pod split the thorn also split and thus appeared to be a weird claw like thing. I have never seen them anywhere since. They would be really nice in a dried flower arrangement. Can anyone identify the plant?