Now that the milkweeds are going to seed you have to look elsewhere to find butterflies. The golfball shaped flowers of Buttonbush is one of the best. This shrub is native to all the North America except the Northwest. I found this Eastern Tiger Swallowtail near one of our small ponds today. Buttonbush is often found near water.
The scientific name of buttonbush is Cephalanthus occidentals.