|'Maxima' is a deciduous, upright shrub that is vigorous, stoloniferous and grows to 12' tall and wide. Leaves are pinnate, 12"-18" long, consisting of 11 lanceolate to elliptic, toothed, yellowish-green leaflets. Flattened panicles of small white flowers with purplish stalks are produced in large clusters, 10"-18" wide. After blooming period is over, produces small, round, purplish-black fruit. Native to North America.