Ulmus lanceifolia

Ulmus lanceifolia
Scientific classification
Kingdom:	Plantae
Division:	Magnoliophyta
Class:	Magnoliopsida
Order:	Rosales
Family:	Ulmaceae
Genus:	Ulmus
Species:	U. lanceifolia
Binomial name
	Ulmus lanceifolia; Roxburgh ex Wall.
Synonyms
	Ulmus hookeriana Planch.; Ulmus lancaeafolia Roxburgh & Wall.; Ulmus lancifolia Roxburgh; Ulmus tonkinensis Gagnep. (where found in China and Vietnam).;

Ulmus lanceifolia Roxburgh, ex Wall. [2], occasionally known as the Vietnam Elm, is a very large tree native to a wide area of southern Asia extending southeast and eastwards from Darjeeling in the Himalaya, through Bangladesh, southern China, Myanmar (formerly Burma), Thailand, Laos, Vietnam and on discontinuously into Indonesia, straddling the Equator in Sumatra and the Celebes.

Description

Ulmus lanceifolia can reach a maximum height of 45 m, placing it on a par with the English Elm, but with pendulous branches; the bark of the trunk exfoliates in thin scales. The leaves, borne on wing-less branchlets, are narrow, generally lanceolate, < 10 cm long by < 3.5 cm broad, and thick. The tree is deciduous in the north of its range, where it can occur at altitudes of up to 2500 m, but evergreen in the tropics. Given the latitudinal range, there is inevitably a substantial variation in its flowering time, beginning in October in the north, but advancing to February - March in the south. The obovate samarae are 12-30 mm long by 11-24 mm broad ^[1] ^[2].

Pests and diseases

No information available.

Cultivation

The species is not known to survive in Europe, however there are plans (2009) to send cuttings from the U S National Arboretum to the new Ulmatum in the Netherlands. Specimens introduced to the Netherlands by Heybroek in the 1960s did not prove hardy in the north European climate.

Accessions

North America

U S National Arboretum [3] Washington, DC, USA. Trees grown from seed obtained in China.

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. [1]
^ Melville, R. & Heybroek, H. M. (1971). The Elms of the Himalaya. Kew Bulletin Vol. 26 (1). Royal Botanic Garden, Kew, London.

[Fu-1] 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. [1]

[Melville-2] Melville, R. & Heybroek, H. M. (1971). The Elms of the Himalaya. Kew Bulletin Vol. 26 (1). Royal Botanic Garden, Kew, London.

[1]

[2]