Ulmus wallichiana subsp. wallichiana

Ulmus wallichiana subsp. wallichiana
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Ulmaceae
Genus:	Ulmus
Species:	U. wallichiana; Planch.
Subspecies:	U. w. subsp. wallichiana
Trinomial name
	Ulmus wallichiana subsp. wallichiana ;

Ulmus wallichiana subsp. wallichiana was identified by Melville and Heybroek after the latter's expedition to the Himalaya in 1960.^[1]

Description

A deciduous tree growing to 30 m with a crown comprising several ascending branches. The bark of the trunk is grey-brown, furrowed longitudinally. The leaves range from 6–13 cm long by 2.5–6 cm broad, elliptic-acuminate in shape,^[2] and with a glabrous upper surface, on petioles 5–10 mm long. The samarae are orbicular to obovate, 10–13 mm in diameter, on 5 mm pedicels, the seed central.^[1]

Pests and diseases

The tree has a high resistance to the fungus Ophiostoma himal-ulmi endemic to the Himalayas and the cause of Dutch elm disease there.^[1]

Cultivation

The tree is not known to be in cultivation beyond the Himalaya.

References

^ ^a ^b ^c Melville, R. & Heybroek, H. (1971). Elms of the Himalaya. Kew Bulletin, Vol. 26 (1). Kew, London.
^ "Ulmus wallichiana subsp. wallichiana K000852684". Herbarium catalogue. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 17 October 2016.; "Ulmus wallichiana subsp. wallichiana K000852685". Herbarium catalogue. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 17 October 2016.