The elm ''Ulmus wallichiana'' subsp. ''xanthoderma'' was identified by
Melville and
Heybroek
after the latter's expedition to the Himalaya in 1960.
[Melville, R. & Heybroek, H. (1971). Elms of the Himalaya. ''Kew Bulletin, Vol. 26 (1)''. Kew, London.]
The tree is of more western distribution than
subsp. ''wallichiana'', ranging from Afghanistan to
Kashmir
Kashmir () is the northernmost geographical region of the Indian subcontinent. Until the mid-19th century, the term "Kashmir" denoted only the Kashmir Valley between the Great Himalayas and the Pir Panjal Range. Today, the term encompas ...
.
[Bean, W. J. (1970). ''Trees & Shrubs Hardy in the British Isles'', 8th ed., (2nd impression 1976) John Murray, London.]
/ref>
Description
A deciduous tree growing to 30 m with a crown comprising several ascending branches. The bark of the trunk is pale grey, coarsely furrowed longitudinally. The branchlets become orange- or yellow-brown, glandular at first, not hairy. The leaves range from 5.6–14 cm long by 3–7.5 cm broad, leaf shape, elliptic-acuminate in shape,[ ''U. wallichiana'' subsp. ''xanthoderma'', leaves specimen (Melville & Heybroek); Baba Reshi, Gulmarg, Kashmir, India (1960); ; ; ] and with a glabrous upper surface, on petioles 7–10 mm long. The inflorescence is slightly glandular, almost glabrous. The samarae are orbicular to obovate, with a few glandular hairs; the seed central.[
File:U. wallichiana ssp xanthoderma leaf.jpg, ''U. wallichiana'' ssp. ''xanthoderma'' leaf
File:U. wallichiana ssp xanthoderma samara 1.jpg, ''U. wallichiana'' ssp. ''xanthoderma'' samara
]
Pests and diseases
The tree has a high resistance to the fungus ''Ophiostoma himal-ulmi
''Ophiostoma himal-ulmi'' is a species of fungus in the family Ophiostomataceae. It is one of the causative agents of Dutch elm disease. It was first isolated around breeding galleries of scolytid beetles in the bark of ''Ulmus wallichiana'' (t ...
'' endemic to the Himalaya and the cause of Dutch elm disease there.[
]
Cultivation
There are a few trees planted in England and The Netherlands. It is not known in North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
or Australasia.
Accessions
Europe
* Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 643 (Heybroek's clone P296).
* Wijdemeren City Council
Wijdemeren () is a municipality in the Netherlands, in the province of North Holland, on the western border of the Gooi region.
Wijdemeren contains many lakes. In the north(east) ''Spiegelplas'' and ''Ankeveense Plassen'', in the (south)west ''Loo ...
Elm Arboretum, 1 tree planted Brilhoek, Nederhorst den Berg
Nederhorst den Berg () is a village in the province of North Holland, Netherlands. It lies about 8 km northwest of Hilversum in the Vechtstreek area, near the Vecht river. Until 1 January 2002, it was a separate municipality; it is now part ...
2019, tree number: 112793
References
{{Taxonbar, from=Q7879644
wallichiana subsp. xanthoderma
Trees of Afghanistan
Trees of the Indian subcontinent
Plant subspecies
Ulmus articles missing images
Elm species and varieties