Found more pictures from other garden websites that have convinced me that my friend was right that her identification of my mystery plant is Silene Armeria.. It will be one of the plants in my beds that gets moved toward the back of the bed come Fall. I'm going to cut it back today to see if it will rebloom another time this summer. If anybody out there has this same plant, please share with me. I haven't found a website that tell you what to do with this plant after it blooms, how to collect seeds from it.
