Seeds from Cephalanthus occidentalis are offered here. Cephalanthus occidentalis is a species of flowering plant in the coffee family, Rubiaceae, that is native to eastern and southern North America. Common names include Buttonbush, Common Buttonbush, Button willow and Honey bells. C. occidentalis is a deciduous shrub or small tree that averages 3 to 10 feet in height, but can reach 20 ft. The leaves are opposite or in whorls of three, elliptic to ovate, 3 to 7 inches long and 1 to 4 inches broad, with a smooth edge and a short petiole. The flowers are arranged in a dense spherical inflorescence 1 to 2 inches 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. USDA Hardiness Zones 5 to 10.