Buttonbush

Buttonbush, Cephalanthus occidentalis, is a medium/large shrub (5' - 12' height) that enjoys sunny, wet locations. Unique, round flower heads attract butterflies. Great addition to a rain garden.

For more info, see:

https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=g830

Photo credit: Missouri Botanical Garden