Is This Really a Buffalo Bean?

I came across this incredibly bizarre object being used in a window display at a florist shop near my home. I snapped a couple shots, and asked the florist what in the world it was. It was obviously organic in nature, but I had never seen anything like it. He said it was a “Buffalo Bean,” but that’s all he knew about it. He even snapped one open for me and it had a firm white center. I did a quick search online, and while “Buffalo Bean” did turn up quite a few links, I couldn’t find anything looking even close to this. Does anyone out there know what the hell this is? Is it as evil as it looks? Can I cook with it? Help!