The 'Sterile' viburnum is prized for its deeply-lobed foliage and thick, whtie, pom-pom shaped blooms. It will reach 10-12' tall and 8-10' wide at maturity.
Abundant clusters of white flowers bloom against dark-green foliage. 'Nantucket' has an open, upright habit, reaching 8-12' tall and 6-8' wide.