It is also found in eastern Sichuan, southwestern Hubei, and northwestern Hunan provinces, at 2,400 to 4,800 feet (750 - 1,500 m) elevation, where it is typically found on shady, moist sites such as ravines and stream banks. 30☁0'N, 108☄5'E, with an outlying occurrence in northwestern Hunan province at elevations of 2,400 to 4,800 feet (750 - 1,500 m) above sea level. Its primary occurrence is near the Sichuan-Hubei border, ca. Seed cones are short and cylindrical, up to 0.8 to 1 inch (20 - 25 mm) long, terminal, solitary and pendulous on sparsely leaved lateral branchlets.ĭistribution.In autumn, the leaves turn reddish-brown before they are shed with the deciduous branchlets. The upper surface is bright green, with a narrowly grooved midvein, the under surface bearing obscure lines of stomata, lighter green or slightly glaucous, the midrib slightly raised. Leaves (needles) are linear, flattened, straight or slightly curved, about 0.5 inch (12 mm) long and 0.06 inch (1.6 mm broad on mature trees, but on seedlings and young trees are generally 1 to 1.25 inches (24 - 32 mm), sometimes up to 2.5 inches (64 mm) long.The green deciduous branchlets grow up to about 3 inches (7.5 cm) long, often longer on young trees.
The persistent bright, reddish-brown when young, shallowly ridged, carrying the deciduous branchlets, numerous vegetative buds and a few leaves. Branchlets are glabrous, of two kinds, persistent and deciduous.
Bark is reddish-brown when young, becoming darker, greyish, fissured, exfoliating in long, narrow strips. Its crown is conical when young, broad and rounded with age. Dawn redwood is a deciduous coniferous species of tree which will quickly grow to mature heights of 145 feet (45 m) tall, with a tapering trunk broadening to the buttressed base. Additions to the International Conifer Registerĭescription. Delicate flat sprays of narrow, bright green leaves emerge in spring, mature. Unlike most cone-bearing trees, Dawn Redwood loses its foliage each winter. It features an upright, narrowly conical form that enhances many landscapes. 'Ogon' was one of two plants selected in 2006, the inaugural year of the highly popular ACS Collectors' Conifer of the Year Program. A sight to behold, Metasequoia glyptostroboides (Dawn Redwood) is a large deciduous coniferous tree of great beauty. It is also occasionally seen listed as 'Golden Mantle.' Regardless, since 'Ogon' is the original recorded cultivar name that is the only one considered valid. patent for this tree under the name, 'Golden Oji.' As it became aware that the plant was already circulating with a couple of different cultivar names, the patent was soon withdrawn. In 1995, New Oji Paper Company applied for a U.S. Around that same time, Larry Stanley & Sons nursery, Boring Oregon received it and starting distributing it under the name 'Gold Rush,' which to this day is the most commonly seen misspelling. In 1993, Pieter Zwijnenburg Jr., Boskoop, The Netherlands got the first propagation material directly from Japan and renamed it 'Goldrush' and began distributing it under that name in 1997. With this definition, the name 'Ogon' is the valid cultivar name. Its original Japanese name was 'Ogon' which translates to "gold bullion" or "gold coin". This plant has a very long and confusing saga pertaining to its proper nomenclature. The original tree was planted in 1977 at the Kameyama breeding station, Institute for Forest Tree Improvement, New Oji Paper Co., Ltd, Mie, Japan. This cultivar originated in 1974 in Japan as a seedling selected from a batch of X-ray irradiated seed by the New Oji Paper Company. Young trees that do not receive adequate irrigation are highly prone to sun damage. It should be noted that the foliage will burn in the full sun. A mature specimen will easily exceed 20 feet (7 m) tall after 10 years in the landscape. 'Ogon' will create a striking statement in the landscape with it's golden foliage and heavily buttressed trunk. It is a fast-growing selection of dawn redwood with pleasing bright yellow feathery foliage that will turn tawny brown before being shed in the fall. Metasequoia glyptostroboides 'Ogon' is commonly known by the trade name Metasequoia glyptostroboides 'Gold Rush'. Additions to the International Conifer Register.
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