Ironweed ready to bloom

Ironweed Vernonia fasciculata is growing tall in the buffer around the pond.  Soon, it will open its brilliant purple aster-like flowers in clusters at the top of each regal plant.  The name 'Ironweed'  becomes this plant because the stem is tough, straight, and strong, up to 6 feet tall.  It is very attractive to butterflies and native bees, and is a host plant for the American Painted Lady butterfly.
In the photo below, you can see the upper 12 inches of a six-foot tall specimen with flower buds.