Lake Nemrut caldera are the trees dwarf juniper ("Juniperus communis"), Norway maple ("Acer platanoides"), European mountain ash ("Sorbus aucuparia"), common buckthorn ("Rhamnus cathartica"), sessile oak ("Quercus petraea"), pedunculate oak ("Quercus robur"), white willow ("Salix alba"), and the shrubs coinwort cotoneaster ("Cotoneaster nummularius"), cherry plum ("Prunus divaricata"), grey willow ("Salix cinerea"), Greek juniper ("Juniperus excelsa"), breaking buckthorn ("Frangula alnus"), alder buckthorn ("Frangula alnus") and mahaleb cherry ("Prunus mahaleb"). Steppe-like vegetation is spread over wide areas in the caldera. Those are mainly species of milkvetch ("Astragalus"). Other subshrubs and herbaceous plants are prickly thrift ("Acantholimon"), sainfoin ("Onobrychis"), sheep's sorrel ("Rumex acetosella"), "Thymus", "Alyssum", sheep's
Mountain Ash Comprehensive School of the vocational courses are taught at Coleg y Cymoedd's Aberdare campus and at Merthyr Tydfil College. 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