Ulmus wallichiana subsp. xanthoderma
| Ulmus wallichiana subsp. xanthoderma | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Ulmus |
| Species: | |
| Subspecies: | U. w. subsp. xanthoderma |
| Trinomial name | |
| Ulmus wallichiana subsp. xanthoderma | |
| Synonyms | |
| |
The elm Ulmus wallichiana subsp. xanthoderma was identified by Melville and Heybroek after the latter's expedition to the Himalaya in 1960.[1] The tree is of more western distribution than subsp. wallichiana, ranging from Afghanistan to Kashmir.[2]
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, elliptic-acuminate in shape,[3] 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.[1][2]
U. wallichiana ssp. xanthoderma leaf
U. wallichiana ssp. xanthoderma samara
Pests and diseases
The tree has a high resistance to the fungus Ophiostoma himal-ulmi endemic to the Himalaya and the cause of Dutch elm disease there.[1]
Cultivation
There are a few trees planted in England and The Netherlands. It is not known in North America or Australasia.
Accessions
Europe
- Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 643 (Heybroek's clone P296).
- Wijdemeren City Council Elm Arboretum, 1 tree planted Brilhoek, Nederhorst den Berg 2019, tree number: 112793
References
- ^ a b c Melville, R. & Heybroek, H. (1971). Elms of the Himalaya. Kew Bulletin, Vol. 26 (1). Kew, London.
- ^ a b Bean, W. J. (1970). Trees & Shrubs Hardy in the British Isles, 8th ed., (2nd impression 1976) John Murray, London. ISBN 9780719517907 [1]
- ^ "Herbarium specimen - L.1582387". Botany catalogues. Naturalis Biodiversity Center. U. wallichiana subsp. xanthoderma, leaves specimen (Melville & Heybroek); Baba Reshi, Gulmarg, Kashmir, India (1960); "Ulmus wallichiana subsp. xanthoderma K000442471". Herbarium catalogue. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 17 October 2016.; "Ulmus wallichiana subsp. xanthoderma K000852680". Herbarium catalogue. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 17 October 2016.; "Ulmus wallichiana subsp. xanthoderma, leaves and samarae K000852681". Herbarium catalogue. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 17 October 2016.