Osage!!! I've built quite a few hunting weight bows 1" or less, in width ,at the widest part of the limb.You can pull it off with whitewoods ,such as hickory,or hophornbeam,(well seasoned and dry) ,with a good tiller,which utilizes every inch of lenght ,and, heat treating the limbs.Check out the"little hickory bow D-bow",I posted last week,it's 1 1/8" at it's widest. God Bless