Cephalanthus occidentalis

The common buttonbush or button-willow is a deciduous shrub or small tree in the rose or Rosaceae family that is native to eastern and southern North America. It commonly reaches 1–3 m in height, but may grow up to 3m tall.

• Leaves are deciduous, simple, opposite or in whorls of three, elliptic to ovate, 7–18 cm long and 4–10 cm broad, with a smooth edge and a short petiole.
• Flowers are arranged in a dense spherical inflorescence 2–3.5 cm in diameter on a short peduncle. Each flower has a fused white to pale yellow four-lobed corolla forming a long slender tube connecting to the sepals. The stigma protrudes slightly from the corolla.
• Fruit is a spherical cluster of achenes (nutlets).