A tree with a broad and rounded crown that grows irregularly. Height 15 - 20 (25) m. The shape of the leaf differs radically from that of the species. The leaf is linear to elongated, with irregular deep incisions and is sharply serrated. Sometimes it is linear to lanceolate. The narrowest leaves, generally at the top of the summer shoots, are approx. 1 cm wide. It can happen regularly that the leaves 'revert' to assume the shape of those of the species. The dark green leaves are very glossy. Young leaves carry velvety hairs on the underside. Occasionally light-green to yellow spots occur on the green leaf. The flowers and fruit are similar to those of the species. Winter hardiness zone: 6a