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The Leyland cypress, Cupressus × leylandii, × Cuprocyparis leylandii or × Cupressocyparis leylandii, often referred to simply as leylandii, is a fast-growing coniferous evergreen tree much used in horticulture, primarily for hedges and screens.
Callitropsis nootkatensis is one of the parents of the hybrid Leyland cypress; the other parent, Monterey cypress (Hesperocyparis macrocarpa), was also considered to be in the genus Cupressus, but in the North American Hesperocyparis clade, which has generally been found to be phylogenetically closer to C. nootkatensis than the Old World clade ...
The fast-growing hybrid Leyland cypress (Cupressus × leylandii), much used in gardens, draws one of its parents from this genus (Cupressus macrocarpa, Monterey cypress); the other parent, Callitropsis nootkatensis (Nootka cypress), is also sometimes classified in this genus, or else in the separate genus Xanthocyparis, but in the past more ...
Monterey cypress is one of the parents of the fast-growing cultivated hybrid Leyland cypress, Cupressus × Leylandii, the other parent being Nootka cypress (Callitropsis nootkatensis). [10] Hesperocyparis macrocarpa cultivars grown in New Zealand are: [33] 'Aurea Saligna'—long cascades of weeping, golden-yellow, thread-like foliage on a ...
The Castlewellan Gold Leyland cypress was developed in the park from a mutant tree. It was selected by the park director, John Keown, and named Cupressus macrocarpa 'Keownii' in 1963. [10] The original specimen is located in the ornamental gardens. [11]
Sep. 28—ATHENS — Leyland cypress are one of the most commonly planted landscape trees, but poor site selection and disease pressure may soon send them the way of red tips and Bradford pears.
Cupressaceae or the cypress family is a family of conifers. The family includes 27–30 genera (17 monotypic ), which include the junipers and redwoods , with about 130–140 species in total. They are monoecious , subdioecious or (rarely) dioecious trees and shrubs up to 116 m (381 ft) tall.
The arboretum in the park was begun in 1740 and contains plants and trees from several different countries, including Spain, Mexico and Wales; [13] the 'Castlewellan Gold' form of Leyland Cypress – originating from a single mutant tree in the arboretum and widely propagated from the 1970s – was selected by the park director, John Keown ...
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