A small tree or shrub, with a maximum height of thirty-five feet. Leaves: opposite, simple, palmately lobed, the lobes acute, sharply serrate. Flowers: in numerous small, lateral and terminal sessile, corymblike racemes. Fruit: of two long-winged samaras, joined at the base, one seeded, glabrous, shining, little diverging.

This is the Maple of the mountains, and has lovely foliage, greenish-yellow flowers, and quantities of long-winged fruit.