
Fall colors persist far into November in the city, though the trees in the suburbs are mostly naked twigs by now.
Some of the brightest and purest reds in the fall come from Virginia creeper, or woodbine. It is a beautiful vine all summer, but when its glossy dark green leaves turn fiery red in fall, it can light up whole tree trunks in the woods. These vines grew (and fruited) at the edge of a small parking area on the South Side Slopes.
Mellon Square is one of the few open spaces downtown, and the only way a whole block could be opened up was by, in effect, making an inverted building under it. Several layers of parking garage are under the square, and the Smithfield Street side, which is below the level of the square, has a row of storefronts along the street.
No tree celebrates fall more enthusiastically than Liquidambar styraciflua, the North American sweetgum. Pittsburgh is a little north of its native range, but it has been adopted everywhere as a favorite urban planting. In the fall, its leaves turn every color of which autumn leaves are capable, all on the same tree—from bright yellow to the deepest eggplant purple.