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The male cones are 3–5 mm long and release highly allergenic pollen in late winter. The cones of C. sempervirens can withstand years of being sealed and are known to perform serotiny. [8] The tree is moderately susceptible to cypress canker, caused by the fungus Seiridium cardinale, and can suffer extensive dieback where
The seed cones are globose to oblong, 20–40 mm long, with 6–14 scales, green at first, maturing brown about 20–24 months after pollination. The pollen cones are 3–5 mm long, and release their pollen in late winter or early spring. [8] [9] [10] The Latin specific epithet macrocarpa means "with large fruit". [11]
Hesperocyparis goveniana is an evergreen tree with a conic to ovoid-conic crown, very variable in size, with mature trees of under 1 m (3 ft 3 in) on some sites, to 50 m (160 ft) tall in ideal conditions. [8] The foliage grows in dense sprays, dark green to somewhat yellow-green in
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 ...
Tetraclinis forest at Al Hoceima National Park. Tetraclinis (also called arar, [2] araar [3] or Sictus tree) is a genus of evergreen coniferous trees in the cypress family Cupressaceae, containing only one species, Tetraclinis articulata, also known as Thuja articulata, [4] sandarac, sandarac tree [5] or Barbary thuja, [6] endemic to the western Mediterranean region.
Hesperocyparis guadalupensis, commonly known as Guadalupe cypress, is a species of western cypress from Guadalupe Island in the Pacific Ocean off the western coast of Mexico's Baja Peninsula. It was previously known as Cupressus guadalupensis until 2009. It is a medium-sized tree with fine green to blue-green foliage.
The tree bark is dark red or brown and has deep grooves. The seeds are found in cones about 2 cm in length, with eight scales and five seeds with tiny resinous vesicles. With the tree being a hybrid, its seeds are sterile. Over time, the cones shrink dry and turn gray or chocolate brown and then have a diameter of 1 cm. [12]
Hesperocyparis arizonica was given its first scientific name and described by Edward Lee Greene in 1882 as Cupressus arizonica, placing it in genus Cupressus. [3] [5] This description was soon after disputed by Maxwell T. Masters who, in 1896, published a journal article where he said it should be considered a subspecies of Cupressus benthamii with the variety name of arizonica. [3]