Buttonbush is a native deciduous shrub found along rivers, in bogs and in swampy area. Cephalanthus blooms in June, producing odd round balls of tiny white fragrant flowers displayed on long stalks. They look like small round pincushions, and butterflies and native pollinators flock to them. Cephalanthus is so wet site tolerant that it will flourish in standing water, and it is very helpful in preventing stream erosion. A tough native which adds an interesting element for naturalizing along rivers and woodland edges.