Seeds Pods?

Any idea what these are? I have seen them a bunch while walking our neighborhood streets and thought they looked really interesting. I finally found a bunch that wasn't thrashed on or super dirty and drug them home. I thought the petal looking pieces would open upwards but they don't - the actually hang downwards looking kinda like a bell. I wired them onto a grapevine wreath and hung it on the front door for Thanksgiving. It looks great!