Hedlundia leyana, commonly known as Ley's whitebeam, is a species of small tree which is endemic to two sites in southern Wales.

[2] Hedlundia leyana has been recorded in the wild from just two sites in the Brecon Beacons near Merthyr Tydfil, Darren Fach and Penmoelallt.

[3] Hedlundia leyana is occurs in scrub or open woodland on crags of Carboniferous limestone at locations where they have access to light.

[1] It is apomictic species which normally has a sparse crop of berries from which germination is poor and this results in only a small amount of natural regeneration taking place.

[1] Sorbis leyana was discovered by the clergyman and botanist Reverend Augustin Ley in the 19th century and was named in his honour by Alfred James Wilmott.