A rather slow-growing tree with a pyramidal crown. Young specimen start with a slender habit, but with age the crown becomes more spreading because of its more spreading branches. Eventually it attains an ovoid crown with a maximum height of circa 15 m. The soft bark is smooth and grey. The shiny dark-green leaves are almost round and distinctly smaller than of the species, only 1.5 - 4 cm across. The autumn colour is yellow brown. The tree has an inflorescence with inconspicuous flower catkins. These are followed by 1 - 2 cm large nuts in bristled husks, only with age does the tree bear profusely. 'Rotundifolia' is applied as a park tree and a solitary. It prospers best in not too wet, well-drained soil, high in humus content. Moderate wind resistance.