Mariesii is a doublefile viburnum noted for its distinctively layered horizontal branching. Non - fragrant flowers in flat - topped, lacecap - like clusters bloom in profusion along the branches in April or May, causing a magnificent sight when in full bloom. Flower clusters appear in two rows or files along the branch, hence the common name. Flowers give way in summer to red berry - like drupes which eventually mature to black. Dark green healthy leaves turn reddish purple in fall; excellent plant for massing or as a specimen, tolerant of drought.