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Arizona cypress is widely cultivated as an ornamental tree. Unlike Monterey cypress, it has proved highly resistant to cypress canker, caused by the fungus Seiridium cardinale, and growth is reliable where this disease is prevalent. The cultivar 'Pyramidalis' [16] has gained the Royal Horticultural Society's Award of Garden Merit (confirmed ...
Cypress canker is a disease affecting Cupressus species, caused by one of several species of fungus in the genus Seiridium. Infection causes die-back of twigs and branches in susceptible cypress trees, [ 1 ] with rapidly increasing amounts of damage and the death of the tree.
Hesperocyparis glabra, known as the Arizona smooth bark cypress or smooth Arizona cypress, is a conifer native to the American Southwest, with a range stretching over the canyons and slopes in a somewhat wide vicinity around Sedona, Arizona.
Members of Hesperocyparis were and still are placed in Cupressus by many authorities, but phylogenetic evidence supports a different affinity. A 2021 molecular study found Hesperocyparis to be the sister group to the genus Callitropsis (containing only the Nootka cypress), with this clade being sister to the Asian genus Xanthocyparis, containing only the Vietnamese golden cypress.
Dawn redwood is widely planted as an ornamental tree because of its excellent horticultural qualities, rapid growth and status as a living fossil. [26] Giant sequoia is a popular ornamental tree [27] and is occasionally grown for timber. [28] Giant sequoia, [29] Leyland cypress, and Arizona cypress are grown to a small extent as Christmas trees ...
It is the primary cause of Cypress canker, a fungal disease that affects various species of trees in the genus Cupressus, including Cupressus sempervirens, the Provence cypress. This disease leads to the decline of infected trees and has led to the destruction of millions in central Italy in particular. [1] [2] It causes branch and trunk cankers.
A large, evergreen tree, Cupressus × leylandii reaches a size between 20 and 25 m high, with its leaves giving it a compact, thick and regular habit. It grows very fast with yearly increases of 1 m. The leaves, about 1 mm long and close to the twig, are presented in flaky, slightly aromatic branches. They are dark green, somewhat paler on the ...
Leaves of young cypress trees are spreading and awl-shaped, and are typically small, scale-like formations that tightly adhere to older branches. They are usually aromatic , with glandular pits on the outer surface, and cover the stem in opposite pairs, giving the branchlet a four-sided appearance.