
Like many invasive species, Oriental Bittersweet came here because it was beautiful. Its berries make a lively splash of color in the winter, especially against a backdrop of evergreens. This vine was growing at the edge of the woods in Bethel Park.

Why should the beautiful die?
These are the grape vines that take over whole lots and smother large trees. When they get to tree-smothering size, they produce thousands of these little grapes, which are intensely flavorful and quite tart. They sweeten a bit after a frost. The grapes hang on into the winter; these were hanging on a huge vine in Beechview in late November.
Porcelainberry (Ampelopsis glandulosa var. brevipedunculata) is another one of those beautiful ornamentals with a plot to take over the world. It was brought into this country for the delightfully subtle colors of its berries. Birds love them, and the vine is distributed everywhere. Here it was fruiting at the lower edge of the South Side Slopes. Above: before a hard freeze; below, after.