Ulmus szechuanica: Difference between revisions
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'''''Ulmus szechuanica''''' Fang, or '''Szechuan Elm''' is a small to medium [[deciduous]] Chinese tree found along the [[Yangtze]] river through the provinces of [[Sichuan]], [[Jiangxi]], [[Anhui]], and [[Jiangsu]]. It can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown. The leaves, distinguished by their emergent red colour, are generally obovate < 9 cm long by 5 cm broad, borne on branchlets with an irregular corky layer. The wind-pollinated petal-less flowers are produced on second-year shoots in February, followed by suborbicular [[Samara (fruit)|samarae]] < 16 mm by 13 mm in March. |
'''''Ulmus szechuanica''''' Fang, or '''Szechuan Elm''' is a small to medium [[deciduous]] Chinese tree found along the [[Yangtze]] river through the provinces of [[Sichuan]], [[Jiangxi]], [[Anhui]], and [[Jiangsu]]. It can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown. The leaves, distinguished by their emergent red colour, are generally obovate < 9 cm long by 5 cm broad, borne on branchlets with an irregular corky layer. The wind-pollinated petal-less flowers are produced on second-year shoots in February, followed by suborbicular [[Samara (fruit)|samarae]] < 16 mm by 13 mm in March. |
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The tree was evaluated with other Chinese elms at the [[Morton Arboretum]], [[Illinois]], where it was found to grow best on well-drained soils, and exhibited a resistance to [[Dutch elm disease]]. However, it was also found to be comparatively weak-wooded, making it susceptible to storm damage in winter. |
The tree was evaluated with other Chinese elms at the [[Morton Arboretum]], [[Illinois]], where it was found to grow best on well-drained soils, and exhibited a resistance to [[Dutch elm disease]]. However, it was also found to be comparatively weak-wooded, making it susceptible to storm damage in winter. |
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''U. szechuanica'' is now considered rare and endangered in its native China. |
''U. szechuanica'' is now considered rare and endangered in its native China. |
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==Arboreta specimens== |
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=====North America===== |
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[[Denver Botanic Gardens]], [[Holden Arboretum]] |
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=====Europe===== |
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==Nurseries== |
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=====North America===== |
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Sunshine Nursery, Clinton, Oklahoma, [http://www.sunshinenursery.com/survey.htm], Arborvillage, Holt, Missouri. [http://www.arborvillagellc.com/AV_Catalog_05-06.pdf.pdf]. |
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==Synonymy== |
==Synonymy== |
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*Sichuan Elm: Morton Arboretum Catalogue 2006 |
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* ''Ulmus erythrocarpa'' Cheng |
* ''Ulmus erythrocarpa'' Cheng |
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Revision as of 10:49, 9 February 2007
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| Species: | U. szechuanica
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| Ulmus szechuanica Fang
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Ulmus szechuanica Fang, or Szechuan Elm is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu. It can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown. The leaves, distinguished by their emergent red colour, are generally obovate < 9 cm long by 5 cm broad, borne on branchlets with an irregular corky layer. The wind-pollinated petal-less flowers are produced on second-year shoots in February, followed by suborbicular samarae < 16 mm by 13 mm in March.
The tree was evaluated with other Chinese elms at the Morton Arboretum, Illinois, where it was found to grow best on well-drained soils, and exhibited a resistance to Dutch elm disease. However, it was also found to be comparatively weak-wooded, making it susceptible to storm damage in winter.
U. szechuanica is now considered rare and endangered in its native China.
Arboreta specimens
North America
Denver Botanic Gardens, Holden Arboretum
Europe
Sir Harold Hillier Gardens, Brighton & Hove City Council, NCCPG elm collection [1],
Nurseries
North America
Sunshine Nursery, Clinton, Oklahoma, [2], Arborvillage, Holt, Missouri. [3].
Synonymy
- Sichuan Elm: Morton Arboretum Catalogue 2006
- Ulmus erythrocarpa Cheng
References
- Fu, L. & Jin J. (eds). (1992). China Red Data Book. Rare and endangered plants. Vol. 1. Science Press, Beijing.
- Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. [4]
- Ware, G. (1995). Little-known elms from China: landscape tree possibilities. Journal of Arboriculture, (Nov. 1995). International Society of Arboriculture, Champaign, Illinois, USA. [5]