Sorbus arranensis rupicola") which is still found on Holy Isle. This hybrid species interbred with the rowan/mountain ash ("Sorbus aucuparia") to produce "S. arranesis". The bastard mountain ash ("Sorbus pseudofennica") arose from a further cross between "S. arranensis" and the mountain ash ("S. aucuparia"). Smart showed by using physical characteristics that the species were separate and not a result of random variation. Some overlap does however occur and this suggests that some hybridising may occur between the two species. Sorbus arranensis Sorbus arranensis, sometimes referred to as the Scottish or Arran whitebeam is a species of plant in the family Rosaceae. It
Mountain Ash Comprehensive School Mountain Ash Comprehensive School Mountain Ash Comprehensive School (), known as MACS, is a comprehensive school near Cwmpennar near the town of Mountain Ash, Rhondda Cynon Taf, Wales. The school was formerly known as Mountain Ash Grammar School () and is located near the former Dyffryn Colliery. The Welsh Assembly Government placed all secondary schools in Wales into one of five bands according to a number of factors, such as performance across the three core subjects, attendance levels and the number of pupils on free school meals, with one being the best and five being the worst. Mountain Ash Comprehensive