The Stirton's Whitebeam (Sorbus stirtoniana) is a recently discovered species of tree which can only be found in one place in the World. The location of this species is on the cliffs of Craig Breidden, Montgomeryshire.
The species has only recently been recognised as different from Thin-leaved Whitebeam with which it had been confused with.
There are about 40 trees which can be found on the cliffs of Craig Breidden, Montgomeryshire.
It has been named in honour of Prof. Charles Stirton in recognition of his inspirational work establishing the National Botanic Garden of Wales