Ulmus glabra 'Nana'

Infobox Cultivar | name = "Ulmus glabra"
cultivar = 'Nana'


image_caption = 'Nana', 33 years old, Sir Harold Hillier Gardens.
origin = EuropeThe Dwarf Wych Elm, "Ulmus glabra" 'Nana' is a very slow growing shrub.

Description

The tree rarely exceeds 5 m in height, but is often broader Bean, W. J. (1981). "Trees and shrubs hardy in Great Britain", 7th edition. Murray, London.] White, J. & More, D. (2003) "Trees of Britain & Northern Europe". Cassell's, London. ] . Green Green, P. S. (1964). Registration of cultivar names in Ulmus. "Arnoldia", Vol. 24. Arnold Arboretum, Harvard University. [http://arnoldia.arboretum.harvard.edu/pdf/articles/1605.pdf] ] describes it as a very distinct variety not growing above 2 feet (60 cm) in 10 to 12 years. The dark green leaves are smaller than the type, < 110 mm long by 80 mm broad. A specimen at Kew was described by Henry as 'a slow-growing hemispherical bush that has not increased appreciably in size for many years' Elwes, H. J. & Henry, A. (1913). "The Trees of Great Britain & Ireland". Vol. VII. pp 1848-1929. Private publication [http://fax.libs.uga.edu/QK488xE4/7tgbi/] ] .

Pests and diseases

The low height of the tree should ensure that it avoids colonization by the Scolytus bark beetles and thus remain free of Dutch elm disease.

Cultivation

The tree is still occasionally found in arboreta and gardens in the UK, and has been introduced to North America and continental Europe; it is not known in Australasia.

NB. The ancestry of this cultivar has been disputed in more recent years, Melville considering a specimen once grown at Kew to be a cultivar of "Ulmus × hollandica" Melville, R. (1978). On the discrimination of species in hybrid swarms with special reference to "Ulmus" and the nomenclature of "U. minor" (Mill.) and "U. carpinifolia" (Gled.). "Taxon" 27: 345-351.] .

ynonymy

*"Ulmus glabra" 'Bush': "Plant Buyer's Guide", ed. 5, 253, 1949, without description.

Accessions

;North America
*Arnold Arboretum, acc. no. 448-88;Europe
*Alexandra Park, East Sussex, 6m high, 38 cm dia. at 1 m from ground in 1980; possibly now lost Johnson, Owen (ed.) (2003). "Champion Trees of Britain & Ireland". Whittet Press, ISBN 9781873580615.] .
*Sir Harold Hillier Gardens, UK, acc. nos. 1978.1680, 1978.4729
*Royal Botanic Garden Edinburgh acc. no. 19021001, from Späth nursery, two trees in excellent condition (2004).
*Royal Horticultural Society Gardens Wisley, two specimens, no details available.
*University of Copenhagen, Botanic Gardens, no details available.

Nurseries

North America

None known.

Europe

*PlantenTuin Esveld [http://www.esveld.nl/htmldiaen/u/ulgnan.htm] , Netherlands

References