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A tree ultimately 60 to 70 ft high; young shoots not downy, but with many pale warts. Leaves three-lobed, the lobes pointing forward, with rarely two additional, obscurely developed lobes at the base; 2 to 41⁄2 in. wide, scarcely so long; dark dullish green and glabrous above, pale dull green beneath, with down only along the chief veins; irregularly and sparsely toothed; stalk not milky, glabrous, mostly shorter than the blade. Flowers yellowish, produced in May along with, or after, the leaves, in panicles or racemes 3 to 5 in. long. Fruit with keys 3⁄4 to 1 in. long; the wings nearly parallel.
A hybrid of doubtful origin, but usually ascribed to A. monspessulanum crossed with A. opalus.