Sorbus torminalis, with common names wild service tree, chequers, and checker tree, is a species of tree in the mountain ash or rowan genus (Sorbus) of the rose family (Rosaceae), that is native to Europe, parts of northern Africa and western Asia.
It is a medium-sized deciduous tree growing to 15–25 m (50–80 ft) tall, with a trunk up to 1.3 m (4 ft 3 in) in diameter. The bark is smooth and greyish, but flaky, peeling away in squarish plates to reveal darker brown layers. The leaves are 6–14 cm (2–6 ...