A couple years ago, I was walking up to the green on the 14th at Crystal Downs. I had my head down, likely because it wasn't during my shot, and saw a turf type that wasn't typical of Northern Michigan. I pulled some up, expressed to the group that I thought it was common bermudagrass, and then gave the sample to Mike Morris, the super there. He confirmed it....common bermudagrass at Crystal Downs. I've seen it in other locales in Michigan....near New Buffalo, also in Sparta at the local soccer field, etc. It's a hardy plant for sure.
Joe