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").
Aphis pomi "A. pomi", especially at high temperatures. Besides occurring on apple ("Malus domestica"), "Aphis pomi" infests other plants in the family Rosaceae including pear ("Pyrus communis "), hawthorn ("Crataegus monogyna"), medlar ("Mespilus germanica"), quince ("Cydonia oblonga"), mountain ash ("Sorbus aucuparia"), rose ("Rosa") and spiraea ("Spiraea"). It is an autoecious species, completing its life cycle on a single host species. Overwintering eggs hatch in spring and the aphids colonise the growing tips of the shoots causing the edges of the leaves to curl. These aphids are all viviparous females and give birth to other wingless aphids by parthenogenesis. In June some winged