The tree is said to resemble Ulmus minor 'Umbraculifera' in form, though more globose in outline, Photograph of Koopmanii': with a dense, narrowish oval crown, a height to 35 feet , and small, ovate leaves Photograph of Koopmanii': When grafted, the tree has an ovoid head but is shrubby and stoloniferous when propagated by cuttings.