Sorbus × hybrida by thrushes and waxwings, which disperse the seeds. It is a tetraploid species of hybrid origin between "S. aucuparia" (European rowan) and "S. intermedia" (Swedish whitebeam), the latter being a tetraploid triple hybrid between "S. aucuparia", "S. torminalis", and either "S. aria" or one of its close relatives. "S. intermedia" differs from "S. hybrida" in having the leaves less deeply lobed with no separate leaflets. Closely related "Sorbus meinichii" is a triploid or tetraploid species of hybrid origin between "S. hybrida" and "S. aucuparia" and differs in having the basal four to six pairs of lobes cut right to the
Mountain Ash, Rhondda Cynon Taf Mountain Ash, Rhondda Cynon Taf Mountain Ash () is a town (and former community) in the Cynon Valley, within the County Borough of Rhondda Cynon Taf, Wales. At the 2001 census, Mountain Ash had a population of 7,039 increasing to 7,374 at the 2011 Census. The Mountain Ash geographical area incorporates and includes the districts and villages of Cefnpennar, Cwmpennar, Caegarw, Darranlas, Fernhill, Glenboi and Newtown. Mountain Ash lies within the historic county boundaries of Glamorgan. The town lies about 4.5 miles south of the town of Aberdare and approximately 19 miles northwest of Cardiff. The village and community of