This has been found growing in a few spots here in Central Park, New York City. None of us have seen it here before. It is growing in newly disturbed or restored sites, in full sun. The tiny flower has five petals, pinkish-purple with yellow anthers. Inside the red fruit are very tiny black seeds, they look like tiny poppy seeds. Foliage is basal, yellow-green, slightly fleshy. Any help would be much appreciated.