It's Virginia Creeper (Parthenocissus vitacea)
Thicket Creeper (Parthenocissus inserta)
It's a native vine that has great bright red fall color. It's worth keeping for that alone, but it can be somewhat aggressive. If you have formal beds, it's probably not something you want. But, if your beds are more naturalistic it can be a nice component, especially if you can train it to climb a tree.
