‘Mariesii’ is a doublefile viburnum noted for its distinctively layered horizontal branching. It is a broad, dense, multi-stemmed, deciduous shrub that typically matures to 10-12’ tall and spreads to 15’ wide. Non-fragrant flowers in flat-topped, lacecap-like clusters bloom in profusion along the branches in April or May. Flower clusters appear in two rows or files, hence the common name. Each flower cluster (4-6” wide) has small non-showy inner fertile flowers with a showy outer ring of pure white sterile flowers. Pollinated fertile flowers give way in summer to red berry-like drupes which eventually mature to black. Fruits are ornamentally attractive and a food source for birds. Ovate, serrate, dark green leaves (to 5” long) turn reddish purple in fall. ‘Mariesii’ honors Chelsea gardener Charles Maries (1851-1902).