Regent, Royal and Carlton Terrace Gardens lasted until 2011, when it was felled due to disease. The following tree species were recorded in the gardens at the end of the 20th century: ash ("Fraxinus excelsior"), beech, black poplar ("Populus nigra"), cherry ("Prunus avium"), common lime ("Tilia × europaea"), English elm ("Ulmus minor" 'Atinia'), hawthorn ("Crataegus monogyna"), holly, horse chestnut ("Aesculus hippocastanum"), laburnum ("Laburnum anagyroides"), Norway maple ("Acer platanoides"), oak ("Quercus robur"), rowan ("Sorbus aucuparia"), silver birch ("Betula pendula"), small leafed lime ("Tilia cordata"), sweet chestnut ("Castanea sativa"), sycamore ("Acer pseudoplatanus"), tulip tree ("Liriodendron tulipifera"), whitebeam ("Sorbus aria"), white poplar ("Populus alba"), and wych elm ("Ulmus glabra").
Mountain Ash East Newtown, Caegarw, Cwmpennar and Cefnpennar. According to the 2011 UK Census Mountain Ash East had a population of 2,909. Mountain Ash East includes the village's Grade II listed St Margaret's Church, designed by John Pollard Seddon. An electoral ward of Mountain Ash East pre-existed the community. The ward elects one county councillor to Rhondda Cynon Taf County Borough Council. Since 1995 the ward has been represented on the council by Plaid Cymru councillor, Pauline Jarman, who was previously a councillor on Cynon Valley Borough Council. She first stood for election in 1976. Cllr Jarman has been leader of the Plaid