I believe I have "American Bittersweet". I live in zone 5 (Michigan). I received four plants as a gift three years ago. Two died immediatly. I have two left that are doing quite well, except they haven't flowered. I know you need a pollinator. I have no idea if I have a male/female or two of the same. Is there any way to tell at this age yet? They are in a very sunny spot. The plants are about 3-4 feet tall right now. Any help would greatly be appreciated! Gina