1、 Leaf difference

The leaves of the gum tree are 3 to 8 whorls, oval oblong, oblanceolate or spoon shaped, vaguely oval or oblong, about 7 to 28 cm long and about 2 to 11 cm wide. The leaves are glabrous, round or slightly blunt at the top, wedge-shaped at the base of the leaves, and 1 to 2.5 cm long at the petiole

The leaves of Photinia are leathery, long oval, obovate oval or long obovate, 9 to 22 cm long and 3 to 6.5 cm wide. The apex is slightly pointed, and the base is round or wide wedge-shaped. The edge of the leaves has sparse fine serrations, the upper part of the leaves is shiny, both sides are glabrous, and the petiole is stout

2、 Flower difference

Sugar gum tree has white flowers, many flowers form dense cymes, the inflorescence is terminal, the corolla tube is 6 to 10 mm long, and the flower lobes are oblong or oval oblong

The compound corymbose of Photinia is terminal, with a diameter of 10 to 16 cm. The flowers are dense, with a diameter of 6 to 8 mm. The sepals are broadly triangular, and the petals are white, nearly round, with a diameter of 3 to 4 mm