 The leaves are 7–15 cm long and 3–6 cm broad, simple, unlobed, and pinnately veined with 18–24 pairs of veins and a serrated margin.They resemble leaves of hornbeams more than they do other maples, except for being arranged in opposite pairs, and in the very small basal pair of veins being palmately arranged as in other maples.The flowers are 1 cm diameter, greenish yellow, produced in pendulous racemes 5–12 cm long in spring as the new leaves open; they are dioecious, with male and female flowers on separate trees.