×Cupressocyparis leylandii 'Castlewellan'

('Castlewellan Gold', a name under which this cultivar is best known, is a later name and therefore without priority). Sprays dark blue-green with gold tips. This cultivar has an attractive upright form but is a rapid grower that should not be planted in small gardens. Originating on the property Castlewellan Forest Park in County Down, Ireland from seed collected by Mr J. McKeown from a Cupressus macrocarpa 'Lutea' which was growing next to a Chamaecyparis nootkatensis 'Lutea'. Introduced probably in the late 1960's and widely propagated after 1970, available in the 1980's in the UK and Australia and soon becoming the most popular of the Leyland Cypresses.