Ulmus campestris var. glabra Hartig, Planch., Aschers. & Graebn.
Ulmus carpinifolia Gled.
Ulmus foliaceae Gilibert, Sarg.
Ulmus glabra (non Huds.), Ley, Mill., Smith, Loudon, Rchb., Wilkomm, C. K. Schneid.
Ulmus micrantha Kitt.
Ulmus microphylla Mill.
Ulmus nitens Moench
Ulmus sparsa Dumrt.
Ulmus minor subsp. minor, the narrow-leaved elm (also known as smooth-leaved elmorEast Anglian elm), was the name used by R. H. Richens (1983) for English field elms that were not English elm, Cornish elm, Lock elmorGuernsey elm.[1] Many publications, however, continue to use plain Ulmus minor for Richens's subspecies, a name Richens reserved for the undifferentiated continental field elms.[2] (Ulmus minor is native to southern Europe and Asia Minor including Iran.) Dr Max Coleman of Royal Botanic Garden Edinburgh argued in his 2002 paper 'British Elms' that there was no clear distinction between species and subspecies.[3]
In England, narrow-leaved elm is the commonest field elm in East Anglia, the East Midlands, and eastern Kent.[4][5]
The smooth-leaved elm is a deciduoustree that can grow to 35 m. Its Latin synonym carpinifolia alludes to the superficial similarity of the leaves to those of hornbeamCarpinus sp., while the common names contrast the smooth upper surface and narrowness of the leaves with those of the wych elm, which are rough and broad.[6][7] The apetalousperfect wind-pollinated flowers, and fruit (samaras) are very similar to those of the species.
Although the smooth-leaved elm is generally susceptible to Dutch elm disease, it is genetically a highly variable tree and it is possible some specimens survive in the UK owing to an innately high level of resistance (see Cultivation). Research currently (2009) in hand by CemagrefatLe Pepiniére forestiére de l'Etat, Guémené-Penfao, France, should confirm this. However, all smooth-leaved elm varieties are believed to have been introduced into Britain from central and southern Europe during the Bronze Age,[8] and some, being beyond their natural climates and environments, may be growing slowly and thus producing smaller springwood vessels restrictive to the Ophiostoma fungus. Good performance in the field may also be owing to resistance to bark beetle feeding or breeding. Moreover, several types of this subspecies also have very pendulous twigs when mature, a factor which could also make them unattractive to foraging Scolytus beetles, which are disinclined to invert themselves.[9]
As the tree suckers readily, its genetic resources are not considered endangered.[10]
The subspecies has a moderate to high susceptibility to the elm leaf beetle, Xanthogaleruca luteola, and a moderate susceptibility to elm yellows.[11]
Four great East Anglian elms, Ulmus minor subsp. minor, tower over an oak (left) and a two-storey house, Badingham, Suffolk, 1984
Many mature specimens still survive in England, notably in East Anglia.[12][13][14] The Woodland Trust currently lists (2013) some 120 surviving "ancient" smooth-leaved elms in England and Wales,[15] some of which are among the elms now being cloned, propagated and planted as part of The Conservation Foundation's 'Great British Elm Experiment' and 'Ulmus londinium' projects, a scheme to identify disease-resistant strains and return elms to city and countryside.[16][17][18] Among "varieties with most resistance", Professor Oliver Rackham noted (1986) the 'Boxworth elm',[19] still thriving (2022)[20] in and around Boxworth, Cambridgeshire,[21] and from c.2010 propagated experimentally by the Conservation Foundation.[22]
In a more academically-based project, most of the clones of the surviving European field elms that have been tested since the 1990s for innate resistance to Dutch elm disease by national research institutes in the EU, with a view to returning field elm to cultivation in Europe,[23] would be classified by Richens’s system as Ulmus minor subsp. minor. Results from Spain (2013), for example, confirm that a very small number of surviving field elms (about 0.5% of those tested) appear to have comparatively high levels of tolerance of the disease, and it is hoped that a controlled crossing of the best of these will produce resistant Ulmus minor hybrids for cultivation.[24]
Narrow-leaved elm was occasionally planted as an ornamental urban tree.
Narrow-leaved elms (East Anglian elm group), Dean Road, Bartlow, Cambridgeshire (2006)[25]
The largest recorded tree in the UK grew at Great AmwellinHertfordshire, measuring 40 m in height and 228 cmdiameter at breast height (d.b.h.) in 1911.[31] Another famous specimen was the great elm that towered above its two siblings at the bottom of Long Melford Green, Long Melford, Suffolk,[32] till the group succumbed to disease in 1978. The three "were survivors of a former clone of at least nine elms, one dating from 1757".[33] The Long Melford elms were painted in 1940 by the watercolourist S. R. Badmin in his 'Long Melford Green on a Frosty Morning', now in the Victoria and Albert Museum.[34]
The tree's natural range in eastern England overlaps with that of wych elm (Ulmus glabra), the two species hybridizing to produce elms of the Ulmus × hollandica group. Nursery cultivars in this group with English U. minor subsp. minor in their parentage include 'Vegeta', 'Cicestria', and 'Smithii'.
U. minor subsp. minor is believed to have hybridized also with Plot's elm to create elms of the Ulmus × viminalis group, presumed source of the cultivar 'Viminalis' or 'Antarctica'.
^Stace, C. A. (1997). New Flora of the British Isles, 2nd edition. Cambridge University Press.
^White, J. & More, D. (2003). Trees of Britain & Northern Europe. Cassell's, London.
^Richens, R. H. (1983). Elm. Cambridge University Press.
^Webber, J. (2008). Dutch elm disease in Britain. Forest Research, Forestry Commission, Alice Holt, Farnham, Surrey
^Collin, E., Bilger, I., Eriksson, G. & Turok, J. (2000). The conservation of elm genetic resources in Europe, in Dunn, C. P., (Ed.) (2000) The Elms: Breeding, Conservation and Disease Management. Kluwer Academic Publishers, Boston, USA.
^Mittempergher, L; Santini, A (2004). "The history of elm breeding"(PDF). Investigacion Agraria: Sistemas y Recursos Forestales. 13 (1): 161–177.
^'"Super tree" from Northamptonshire helping to fight Dutch Elm Disease and repopulate woodlands', northamptonchron.co.uk [1]Archived 2013-12-03 at the Wayback Machine
![Narrow-leaved elms (East Anglian elm group), Dean Road, Bartlow, Cambridgeshire (2006)[25]](http://en.wikipedia.org/wiki/File:Bartlow_Elms_-_geograph.org.uk_-_263191.jpg)
![Pollarded 'Boxworth elm' (East Anglian elms group), Boxworth, Cambridgeshire (2008) [20]](http://en.wikipedia.org/wiki/File:Church_Lane%2C_Boxworth_-_geograph.org.uk_-_1038485.jpg)
![East Anglian elms (all the trees here), Abbots Ripton, Huntingdonshire (2011)[26][27]](http://en.wikipedia.org/wiki/File:Abbots_Ripton_entrance_sign_-_geograph.org.uk_-_2289894.jpg)
![Narrow-leaved elms near Tillingham, Dengie peninsula, Essex (2010)[28][29]](http://en.wikipedia.org/wiki/File:View_across_field_from_Bradwell_Road%2C_Tillingham_-_geograph.org.uk_-_275831.jpg)
![East Kent narrow-leaved elms above Tonge Mill, near Sittingbourne (1969)[5][30]](http://en.wikipedia.org/wiki/File:Tonge_Mill_in_1969_-_geograph.org.uk_-_1761018.jpg)
![[3]](http://images.francisfrith.com/c10/450/39/L101004.jpg){kind=link}