Updated with the correct spelling (thank you Glen from gardens), I find some more results, including pictures of the fruit and other information.

I visited the Frederick Meijer Gardens and Sculpture Park, Near Grand Rapids last week with my granchildren.  Not too many flower shots but I saw this curiosity and chased down a staff person who was kind enough to find another staff person, and another and finally walkie talkies were used.  The name I believe I was told is Dranuncula, but I can’t find much about it on the web.  I was told that it’s one of the family of meat eaters that attracts its prey by smelling like carrion.  It was not smelling bad yet, that I could tell.   Click on the small images for a bigger one.