Buttonbush, a native species, has been added to the USWildflowers database (08/19/2012.) Scientific name is Cephalanthus occidentalis. Photo below was taken in Hamilton County, TN on Aug 19, 2012. It is also known by the common names Common Buttonbush, Button Ball, Riverbush, Honey-bells, and Button Willow . Go to the Buttonbush detail page for more photos and information.