Must agree with the blue mistflower. It is a big hit out here with the Queens. As you can see by this photo of a small plant - they flock to it. So imagine our National Butterfly Center that has these bushes along the fencelines and also huge patches throughout the park - we literally get to see thousands of Queens.
Often times, so many - that you occasionally hear someone saying, "Will all the Queens please fly and hover 15 inches above the plants."
And if you're wondering why, it's because we'd like to see what other butterflies are nectaring without suffering from Queen overload!!!