Related Research Articles
The American Elm cultivar Ulmus americana 'Delaware' was originally selected from 35,000 seedlings inoculated with the Dutch elm disease fungus in USDA trials at Morristown, New Jersey.
The American Elm cultivar Ulmus americana 'New Harmony' was raised by the Maryland Agricultural Research Service and released by the United States National Arboretum in 1995, along with 'Valley Forge'. 'New Harmony' proved the most successful U. americana cultivar in the US National Elm Trial, averaging a survival rate of 85.5% overall.
The Chinese Elm cultivar Ulmus parvifolia 'Emer II' or 'Emerald Vase' was cloned from a tree planted circa 1910 on the University of Georgia campus at Athens.
The Chinese Elm cultivar Ulmus parvifolia 'Emer I' or 'Emerald Isle' was cloned from a tree planted circa 1920 on the University of Georgia campus at Athens.
The Chinese Elm cultivar Ulmus parvifolia 'A. Ross Central Park' is probably the hardiest in cultivation and was patented in 1989 by David F. Karnosky. The original tree grew near the entrance to Central Park, at the junction of Fifth Avenue and 72nd Street in the Upper East Side of Manhattan in New York City, and died in the 1990s aged over 100 years. The cloning project was initiated in 1976 by the Arthur Ross Foundation, and executed by the School of Forestry and Wood Products, Michigan Technological University, Houghton.
The Chinese Elm cultivar Ulmus parvifolia 'Golden Rey' is an American clone patented by B. Rey in 1990.
The American elm cultivar Ulmus americana 'Lewis & Clark' is a development from the North Dakota State University (NDSU) Research Foundation breeding programme, released in 2004 to commemorate the 200th anniversary of the eponymous expedition. The cultivar was cloned from a tree discovered in 1994 along the Wild Rice River south west of Fargo, ND., where all those around it had succumbed to Dutch elm disease; the tree remains in perfect health (2008). Prairie Expedition proved only moderately successful in the US National Elm Trial, averaging a survival rate of 62.6% overall, owing largely to environmental factors rather than susceptibility to Dutch elm disease.
The Chinese Elm cultivar Ulmus parvifolia 'Todd' was developed by Fleming's Nurseries in Victoria, Australia, and registered in 2001.
The American Elm cultivar Ulmus americana 'Littleford' was cloned from a tree in Hinsdale, Illinois, circa 1915 and first released in 1927.
The American elm cultivar Ulmus americana 'Ascendens' is a relatively old clone.
The Chinese Elm cultivar Ulmus parvifolia 'Cork Bark' is a North American clone.
The American Elm cultivar Ulmus americana 'Jackson' was cloned from a selection made at Wichita, Kansas, which had reputedly shewn no signs of Dutch elm disease damage at >50 years of age.
The Chinese Elm cultivar Ulmus parvifolia 'Garden City Clone' was raised in Kansas. The champion tree was 18 m tall in 1993; however, the name 'Garden City Clone' is not officially recognized.
The Chinese Elm cultivar Ulmus parvifolia 'Prairie Shade' is an American clone selected in 1973 in Oklahoma.
The Chinese Elm cultivar Ulmus parvifolia 'Red Fall' is an American clone selected by S. Bieberich of the Sunshine Nursery, Clinton, Oklahoma.
The Chinese Elm cultivar Ulmus parvifolia 'State Fair' was cloned from a tree growing in the grounds of the Oklahoma State Fair, Oklahoma City.
The Chinese Elm cultivar Ulmus parvifolia 'Stone's Dwarf' was commercially released in the US in 1978.
The Chinese Elm cultivar Ulmus parvifolia 'Nire-keyaki' is a dwarf variety principally used for bonsai.
The Chinese Elm cultivar Ulmus parvifolia 'Taiwan' is a small, evergreen tree from Taiwan.
The Chinese Elm cultivar Ulmus parvifolia 'Blizzard' arose in 2001 from a sport mutation on a tree growing in the Louisville Gardens, Kentucky. It was cloned at the Mast Arboretum of the Stephen F. Austin State University, Nacogdoches, Texas.
References
- ↑ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
