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Ulmus 'Frontier' is an American hybrid cultivar, a United States National Arboretum introduction derived from a crossing of the European Field Elm Ulmus minor with the Chinese Elm Ulmus parvifolia in 1971. Released in 1990, the tree is a rare example of the hybridization of spring- and autumn-flowering elms. Tested in the US National Elm Trial coordinated by Colorado State University, 'Frontier' averaged a survival rate of 74% after 10 years.
Ulmus 'Urban' is an American hybrid elm cultivar selected from the progeny of a controlled crossing of the Siberian Elm Ulmus pumila with the Dutch clone '148' in 1958 by Toru Arisumi of the USDA at Columbus, Ohio. Clone '148' had been sent to the US from the Netherlands in 1952 by Johanna Went, leader of the elm research team at the Willie Commelin Scholten Phytopathology Laboratory in Baarn.
The Wych Elm cultivar Ulmus glabra 'Lutescens', commonly known as the Golden Wych Elm, arose as a sort of a wych found in the York area in the early 19th century by W. Pontey of Pontey's nursery, Kirkheaton, Huddersfield, who propagated and distributed it. The original tree he named the Gallows Elm for its proximity to a gallows near York. Loudon in The Gardener's Magazine (1839) identified it as a form of Ulmus montana, adding 'Lutescens' by analogy with Corstorphine sycamore, Acer pseudoplatanus 'Lutescens'.
The American Elm cultivar Ulmus americana 'Princeton' was originally selected in 1922 by New Jersey nurseryman William Flemer of Princeton Nurseries for its aesthetic merit. 'Princeton' was later found to have a moderate resistance to Dutch elm disease (DED).
Ulmus parvifolia 'Emer II' or 'Emerald Vase' is a Chinese Elm cultivar that 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.
Ulmus parvifolia 'A. Ross Central Park' is a Chinese elm cultivar that is probably the hardiest in cultivation and was patented in 1989 by David F. Karnosky. The original tree, planted c.1873, 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 'Drake' was first marketed by the Monrovia Nursery of Azusa, California from 1952 to 1953.
The Chinese Elm cultivar Ulmus parvifolia 'Dynasty' is a United States National Arboretum introduction reputed to be very fast-growing.
The Chinese Elm cultivar Ulmus parvifolia 'Pathfinder' is another development by A. M. Townsend of the USDA National Arboretum registered in 1990.
The Chinese Elm cultivar Ulmus parvifolia 'Sempervirens' is an American introduction from south China, commonly known by the synonym 'Evergreen'. It was first listed by Bailey & Bailey in Hortus Second, 747, 1941.
The Chinese Elm cultivar Ulmus parvifolia 'Ohio' was raised by A. M. Townsend at the USDA National Arboretum, and released in 1992.
The Chinese Elm cultivar Ulmus parvifolia 'Frosty', or 'Frosty' lacebark elm, was intended primarily as a dwarf variegated variety. Krüssmann (1976) states that it was raised in Japan.
The winged elm cultivar Ulmus alata 'Lace Parasol' was found by a North Carolina nurseryman growing in local woods. Removed to his yard, it remained there until his death, when it was removed again to the North Carolina State Arboretum in Raleigh by J. C. Raulston.
The Chinese Elm cultivar Ulmus parvifolia 'Elsmo' was released by the USDA Soil Conservation Service, at Elsberry, Missouri, in 1990 as an open-pollinated, seed-propagated cultivar of extremely variable progeny.
The Siberian elm cultivar Ulmus pumila 'Dwarf Weeper' was discovered in a western Illinois garden and sold by the Arborvillage Nursery Holt, Missouri.
Ulmus parvifolia 'BSNUPF' is a Chinese Elm cultivar, cloned from a chance seedling at Bold Spring Nursery, Bold Spring, Georgia. Patented in 2007, it was raised by John Barbour of Athena Trees, Monroe, Georgia.
The cultivation of elms in Australia began in the first half of the 19th century, when British settlers imported species and cultivars from their former homelands. Owing to the demise of elms in the northern hemisphere as a result of the Dutch elm disease pandemic, the mature trees in Australia's parks and gardens are now regarded as amongst the most significant in the world.
The Chinese Elm cultivar Ulmus parvifolia 'Lois Hole' is a dwarf variety cloned from 'Frosty'.
Ulmus parvifolia, commonly known as the Chinese elm or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, and Vietnam. It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus".
References
- ↑ American Nurseryman, 175 (4): 62, 1992
- 1 2 3 4 The National Gardening Association Plant Database, U. parvifolia 'Golden Rey', garden.org/plants
- ↑ Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
- ↑ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ↑ U. parvifolia 'Golden Rey', Juniper Level Botanic Gardens, Raleigh, North Carolina, planted 1989; photograph 2024
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