What is this plant? It was found near Annapolis, Maryland the weekend of June 1, 2008. It was a single trunk/stem growing up into a pine tree that was growing in the understory. It was about 5 feet and some inches tall. The flowers are five-petaled and the leaves are opposites. The leaves are approximately 2 inches long and the flowers are approximately 1/4 inch in size. Any idea what it is?