Boston ivy, Parthenocissus tricuspidata, Close-up detail of red autumn leaves.

Boston ivy, Parthenocissus tricuspidata, Close-up detail of green leaves turning red and yellow in autumn.

Boston ivy, Parthenocissus tricuspidata, growing across a bricked up window on a New York apartment block.

Boston ivy, Parthenocissus tricuspidata growing across a dilapidated window and air conditioning unit on a New York apartment block.

Boston ivy, Parthenocissus tricuspidata.

Boston Ivy, Parthenocissus tricuspidata.

Boston Ivy, Parthenocissus tricuspidata.