Ulmus elongata

Ulmus elongata
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Ulmaceae
Genus: Ulmus
Species: U. elongata
Binomial name
Ulmus elongata
L. K. Fu & C. S. Ding

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]

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] . 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

Europe

References

  1. Fu, L. & Jin, J. (eds). (1992). China Red Data Book. Rare and endangered plants. Vol. 1. Science Press, Beijing.
  2. 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
  3. 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

This article is issued from Wikipedia - version of the 7/14/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.