The Leyland cypress, Cupressus × leylandii, often referred to simply as leylandii, is a fast-growing coniferous evergreen tree much used in horticulture, primarily for hedges and screens. Even on sites of relatively poor culture, plants have been known to grow to heights of 15 metres in 16 years.
The Leyland Cypress has been reclassified a few times and is now known as × Hesperotropsis leylandii. It is a fast-growing, vigorous, evergreen tree in the Cupressaceae family. It's formed from a cross of the Monterey Cypress, Cupressus macrocarpa and the Nootka Cypress, Cupressus nootkatensis.
