Ulmus wallichiana subsp. xanthoderma
{{Short description|Subspecies of elm}}
{{Infraspeciesbox
|image = U. wallichiana ssp xanthoderma.jpg
|image_caption =
|genus = Ulmus
|species = wallichiana
|subspecies = xanthoderma
|authority = Melville & Heybroek
|synonyms = *Ulmus brandisiana C. K. Schneid.
}}
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.Bean, W. J. (1970). Trees & Shrubs Hardy in the British Isles, 8th ed., (2nd impression 1976) John Murray, London. {{ISBN|9780719517907}} [http://www.beanstreesandshrubs.org/browse/ulmus/ulmus-wallichiana-planch/]
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,{{Naturalis Biodiversity Center |id=L.1582387 }} U. wallichiana subsp. xanthoderma, leaves specimen (Melville & Heybroek); Baba Reshi, Gulmarg, Kashmir, India (1960); {{cite web|website=Herbarium catalogue|title=Ulmus wallichiana subsp. xanthoderma K000442471|publisher=Board of Trustees of the Royal Botanic Gardens, Kew|access-date=17 October 2016|url=http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000442471}}; {{cite web|website=Herbarium catalogue|title=Ulmus wallichiana subsp. xanthoderma K000852680|publisher=Board of Trustees of the Royal Botanic Gardens, Kew|access-date=17 October 2016|url=http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000852680}}; {{cite web|website=Herbarium catalogue|title=Ulmus wallichiana subsp. xanthoderma, leaves and samarae K000852681|publisher=Board of Trustees of the Royal Botanic Gardens, Kew|access-date=17 October 2016|url=http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000852681}} 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 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 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
{{Reflist}}
{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}
{{Taxonbar|from=Q7879644}}
wallichiana subsp. xanthoderma
Category:Trees of the Indian subcontinent