Ulmus wallichiana subsp. wallichiana
Appearance
Ulmus wallichiana subsp. wallichiana | |
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Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Rosales |
Family: | Ulmaceae |
Genus: | Ulmus |
Species: | |
Subspecies: | U. w. subsp. wallichiana
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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.
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, and with a glabrous upper surface, on petioles 5–10 mm long. The samarae are orbicular to obovate, 10–13 mm in diameter, the seed central.
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.
Cultivation
The tree is not known to be in cultivation beyond the Himalaya.
References
- Melville, R. & Heybroek, H. (1971). Elms of the Himalaya. Kew Bulletin, Vol. 26 (1). Kew, London.
External links
- "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.