The Motley's Whitebeam (Sorbus x motleyi) is a recently discovered new hybrid found on one site near Merthyr Tydfil, where two young trees have been discovered.
This is an example of evolution in action. The trees originated as a hybrid between Ley's Whitebeam and Rowan in a wood. One of the few remaining Ley's Whitebeams was blown down in the 1989 Hurricane. The extra light caused by the fallen tree created allowed seeds in the soil to germinate and grow.
The tree was named after it's discoverer. The trees were first found in 1999 by Graham Motley of the Countryside Council for Wales when he was monitoring the very rare Ley's Whitebeam.