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A small deciduous tree with a rounded head of branches; branchlets glabrous. Leaves three-lobed, sometimes indistinctly five-lobed; 2 to 3 in. wide, somewhat less long, the stalk about as long as the blade; glabrous, deep glossy green, and rather leathery in texture, the base heart-shaped; lobes shallow and rounded, the side ones with occasionally one to three large teeth on the outer margin. Flowers in small corymbs, yellowish green, produced in April. Fruits glabrous; keys 1 in. long; wings 1⁄3 in. wide, diverging at about 60°.
A hybrid between A. pseudoplatanus and A. monspessulanum. The tree in general aspect and leaf more resembles the Montpelier maple, but the influence of A. pseudoplatanus is evident in the larger leaf, and in the larger fruit with more divergent wings. It is neat and pleasing in habit, and retains its foliage until December or later. There is an example at Kew 24 × 4 ft and another at Westonbirt, Glos., 44 × 51⁄2 ft (both 1966).