Ulmus castaneifolia
| Ulmus castaneifolia | |
|---|---|
 | |
| Chestnut-leafed elm aged 15 years, Sir Harold Hillier Gardens, UK | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Ulmus |
| Species: | U. castaneifolia |
| Binomial name | |
| Ulmus castaneifolia Hemsley | |
| Synonyms | |
|
Ulmus ferruginea W. C. Cheng Ulmus multinervis W. C. Cheng | |
Ulmus castaneifolia Hemsley, the chestnut-leafed elm or multinerved elm, is a small deciduous tree found across much of China in broadleaved forests at elevations of 500–1,600 metres (1,600–5,200 ft).
Description
The tree can reach a height of 20 metres (66 ft) with a trunk of about 0.5 m d.b.h. The bark is thick with a pronounced corky layer, and is longitudinally fissured. The branchlets are devoid of the corky wings common to many elms. The leaves are generally narrow, ranging from obovate to elliptic, up to 15 cm long, and densely hirsute when young. The perfect wind-pollinated apetalous flowers are produced on second-year shoots in February; the samarae are mostly obovate < 30 × 16 mm.[1][2]
Pests and diseases
Ulmus castaneifolia is resistant to Dutch elm disease and to elm leaf beetle Xanthogaleruca luteola.[3]
Cultivation
The species is very rare in cultivation, but as of 2006 is being assessed for its horticultural potential at the Morton Arboretum, Illinois. In artificial freezing tests at the arboretum,[4] the LT50 (temperature at which 50% of tissues die) was found to be −26 °C. There are no known cultivars of this taxon, nor is it known to be in commerce beyond the USA.
Notable trees
The UK TROBI champion grows at the Royal Botanic Gardens Kew; planted in 1973, it measured 13 m high by 33 cm d.b.h. in 2010.[5]
Accessions
- North America
- Chicago Botanic Garden, Glencoe, Illinois. Planted in West Collections Area.
- Denver Botanic Gardens. Acc. details not available
- Morton Arboretum. Acc. no. 46–95. obtained from Yunnan Province, China.
- University of British Columbia Botanical Garden, Vancouver. Acc. no. 027099–0437–1989, (as U. multinervis).
- U S National Arboretum , Washington, D.C., USA. Acc. nos. 76219, 68914.
- Europe
- Calderstones Park, Merseyside, UK. UK Champion, 13 m high, 45 cm d.b.h..
- Grange Farm Arboretum, Sutton St James, Spalding, Lincs. UK. Acc. no. 698.
- Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. no. 18149 (as U. multinervis W. C. Cheng), from Beijing.
- Royal Botanic Gardens, Kew. Acc. no. 1973–11726
- Sir Harold Hillier Gardens. Acc. no. 1994.0327, area PC 700, origin not disclosed.
- Strona Arboretum, University of Life Sciences, Warsaw, Poland, (as Ulmus multinervis).
Nurseries
- North America
References
- ↑ 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
- ↑ White, J. & More, D. (2003). Trees of Britain & Northern Europe. Cassell's, London. ISBN 0304361925
- ↑
- ↑ Shirazi, A. M. & Ware, G. H. (2004). Evaluation of New Elms from China for Cold Hardiness in Northern Latitudes. International Symposium on Asian Plant Diversity & Systematics 2004, Sakura, Japan.
- ↑ Johnson, O. (2011). Champion Trees of Britain & Ireland, p. 168. Kew Publishing, Kew, London. ISBN 9781842464526.