'SMCOSS' is a compact, dwarf selection of buttonbush that features glossy foliage and globular heads of small, white flowers. Mature plants will reach up to 4' tall and spread to fill a similar area. The flowerheads are 1" in diameter and bloom from early to mid summer. The blooms are followed by a red, spherical, compound fruit. The lightly fragrant flowers are highly attractive to hummingbirds, butterflies, and other insect pollinators. Commonly found in nurseries and garden centers sold under the name SUGAR SHACK.