Ulmus elongata
| Ulmus elongata | |
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| Species: | U. elongata
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| Binomial name | |
| Ulmus elongata | |
Ulmus elongata L. K. Fu & C. S. Ding , also known as the Long Raceme Elm in the USA, is a deciduous tree endemic to broadleaf forests in the eastern provinces of China.
Description
The tree grows to a height of < 30 m and trunk < 0.8 m d.b.h. The bark is a brownish grey, and exfoliates in flakes. The coarse leaves are < 20 cm long, narrowly elliptic with an acuminate apex and borne on twigs that occasionally feature corky wings. The wind-pollinated apetalous flowers appear on the second-year twigs in February. The samarae are distinctively shuttle-shaped, < 25 mm in length, on stalks < 22 mm long, and appear in March.[1][2]
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Leaves of U. elongata -
Branches of U. elongata at Gutianshan, China.
Pests and diseases
No information available.
Cultivation
The species was virtually unknown in the West until it was introduced to the Morton Arboretum, Illinois, in the 1990s as part of an evaluation of Chinese elms for landscape use.[3] [2]. Some of the seedlings raised at the Morton Arboretum were donated to the U S National Arboretum (USNA) in Washington, where they have prospered. The species is not known in Australasia. U. elongata is not known to be in commerce, and there are no known cultivars.
Accessions
North America
- Brenton Arboretum, Dallas Center, Iowa. No accession details available.
- Morton Arboretum. Acc. nos. not known. Cuttings grafted onto U. pumila rootstocks, planted out in 2008.
- U S National Arboretum [3], Washington, D.C., United States. Trees grown from seed obtained in China. Acc. nos. 68995, 55393.
Europe
- Grange Farm Arboretum, Sutton St James, Spalding, Lincolnshire, UK. Juvenile trees from cuttings ex. Morton Arboretum on U. glabra rootstocks. Acc. no. 1061.
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. ISBN 1-930723-40-7 [1]
- ^ Ware, G. (1995). Little-known elms from China: landscape tree possibilities. Journal of Arboriculture, (Nov. 1995). International Society of Arboriculture, Champaign, Illinois, USA.
Further reading
- Gao, J. G., G. D. Xu, and W. Q. Li. "Qiu z J, Liu P. Preliminary studies on photosynthetic characteristics of endangered plant Ulmus elongata seedlings." Ecology and Environment Sciences 20.1 (2011): 66–71.
- Jiang, Yan-sheng. "The Study on Natural Regeneration of Ulmus elongata [J]." Journal of Fujian Forestry Science and Technology 4 (2003).
- Lai, W. (2001). The Height Growth of Ulmus elongata Seedlings and Its Correlations with Climatic Factors. Journal of Fujian College of Forestry 2001-02.
- Lai, W. S. "Study on annual growth dynamics of one-year-old seedlings for Ulmus elongata." Journal of Nanjing Forestry University: Natural Science Edition 25.4 (2001): 57–60.
- Lai, W., G. Zou, and J. Zhang. "Influence of the different densities on the growth of Ulmus elongata seedlings, J." Fujian For. Sci. Technol 28.2 (2001): 74–80.
- Lai, W. S. "The study on cuttings propagation of Ulmus elongata." China Forestry Science and Technology 14.6 (2000): 32–33.
- Tian, Y., et al. "The studies on reproductive characteristics of Ulmus elongata." Journal of Hebei Forestry University 11.S1 (1996): 25–29.
- Zhang, J., Chen, Q., Lai, W. (1993). Studies on the Growth Rhythm of Ulmus elongata seedlings. Journal of Fujian Forestry Science and Technology 1993–03.