Ulmus glabra, the wych elm or Scots elm, has the widest range of the European elm species, from Ireland eastwards to the Ural Mountains, and from the Arctic Circle south to the mountains of the Peloponnese and Sicily, where the species reaches its southern limit in Europe; it is also native to the Caucasus region and parts of Western Asia (Turkey, Syria and Iran). A large deciduous tree, it is essentially a montane species, growing at altitudes up to , preferring sites with moist soils and high humidity.Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). Iep of olm, karakterboom van de Lage Landen (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij. The tree can form pure forests in Scandinavia and occurs as far north as latitude 67°N at Beiarn Municipality in Norway. It has been successfully introduced as far north as Tromsø and Alta in northern Norway (70°N). It has also been successfully introduced to Narsarsuaq, near the southern tip of Greenland (61°N).
The tree was by far the most common elm in the north and west of the British Isles and is now acknowledged as the only indisputably British native elm species. Owing to its former abundance in Scotland, the tree was occasionally (primarily historically) known as Scots elm; Loch Lomond is said to be derived from the Gaelic , interpreted by some as 'Lake of the Elms', 'leaman' being the genitive plural form of leam or lem, 'elm'.Richens, R. H. (1983). Elm. Cambridge University Press.
Closely related species, such as Bergmann's elm, U. bergmanniana, and the Manchurian elm, U. laciniata, native to northeast Asia, were once sometimes included in U. glabra;Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. 1848–1929. Republished 2014 Cambridge University Press, another close relative is the Himalayan or Kashmir elm, U. wallichiana. Conversely, U. elliptica from the Caucasus, considered a species by many authorities,Elwes, Henry John, & Henry, Augustine, (1913) The Trees of Great Britain & Ireland, Vol.7, pp.1863-1864 Bean, W. J. (1988) Trees and shrubs hardy in Great Britain, 8th edition, Murray, LondonKrüssman, Gerd, Manual of Cultivated Broad-Leaved Trees & Shrubs (1984 vol. 3) is sometimes listed as a regional form of U. glabra.Richens, R. H., Elm (Cambridge 1983), p.279
Etymology The word "wych" (also spelled "witch") comes from the Old English , meaning pliant or supple, which also gives definition to wicker and weak. Jacob George Strutt's 1822 book, Sylva Britannica, attests that the wych elm was sometimes referred to as "wych hazel", a name now applied to the unrelated genus Hamamelis, commonly called "wych hazels". Full text of expanded 1830 edition.
Classification
Subspecies Some botanists, notably Lindquist (1931), have proposed two subspecies: U. glabra subsp. glabra in the south of the species' range: broad leaves with short tapering base and acute lobes; trees often with a short, forked trunk and a low, broad crown; U. glabra subsp. montana (Stokes) Lindqvist in the north of the species' range (northern Britain, Scandinavia): leaves narrower, with a long tapering base and without acute lobes; trees commonly with a long single trunk and a tall, narrow crown.bioportal.naturalis.nl L.1587168 Ulmus glabra Huds. subsp. montana (Stokes) Lindq., Thirsk, Yorkshire, 1937
Much overlap is seen between populations with these characters, and the distinction may owe to environmental influence, rather than genetic variation; the subspecies are not accepted by either Flora Europaea or Plants of the World Online.Flora Europaea: Ulmus glabra
Description The type sometimes reaches heights of , typically with a broad crown where open-grown, supported by a short bole up to diameter at breast height (DBH). Normally, root suckers are not seen; natural reproduction is by seed alone. The tree is notable for its very tough, supple young shoots, which are always without the corky ridges or 'wings' characteristic of many elms. The alternate leaves are deciduous, long by broad, usually obovate with an asymmetric base, the lobe often completely covering the short (<5 mm) petiole; Sheet labelled Ulmus scabra Mill. = Ulmus montana With.; Sheet labelled Ulmus montana = Ulmus glabra Huds. RBGE specimen, 1900; Sheet described as Ulmus glabra Huds. from Bridge of Allan, Scotland, 1899; Cotyledon and seedling leaves, Ulmus scabra Mill. = Ulmus montana With. the upper surface is rough. Leaves on juvenile or shade-grown shoots sometimes have three or more lobes near the apex.Coleman, M (ed.). (2009). Wych Elm. Royal Botanic Garden Edinburgh. . The perfect hermaphrodite flowers appear before the leaves in early spring, produced in clusters of 10–20; they are 4 mm across on 10 mm long stems, and being wind-pollinated, are apetalous. The fruit is a winged samara 20 mm long and 15 mm broad, with a single, round, 6 mm seed in the centre, maturing in late spring.Bean, W. J. (1981). Trees and shrubs hardy in Great Britain, 7th edition. Murray, London.White, J. & More, D. (2003). Trees of Britain and Northern Europe. Cassell's, London The roots can be of extraordinary length: one at Auchencraig, Larg, Ayershire, Scotland has roots which have been traced for a length of 110 metres from the trunk.
Pests and diseases While the species is highly susceptible to Dutch elm disease (DED),Forestry Commission. Dutch elm disease in Britain, UKBrasier, C. M. (1996). New horizons in Dutch elm disease control. Pages 20–28 in: Report on Forest Research, 1996. Forestry Commission. HMSO, London, UK. it is less favoured as a host by the elm bark beetles, which act as vectors. Research in Spain has indicated the presence of a triterpene, alnulin, rendering the tree bark less attractive to the beetle than the field elm, though at 87 μg/g dried bark, its concentration is not as effective as in Ulmus laevis (200 μg/g). Moreover, once the tree is dying, its bark is quickly colonized by the fungus Phoma, which radically reduces the amount of bark available for the beetle to breed on. In European trials, clones of apparently resistant trees were inoculated with the pathogen, causing 85 – 100% wilting, resulting in 68% mortality by the following year. DNA analysis by Cemagref (now Irstea) in France has determined the genetic diversity within the species is very limited, making the chances of a resistant tree evolving rather remote.Solla et al. (2005). "Screening European Elms for Resistance to Ophiostoma novo-ulmi". Forest Science, 134–141. 51 (2) 2005. Society of American Foresters.
A 300-year-old example growing in Grenzhammer, Ilmenau has allegedly been scientifically proven to be resistant to Dutch elm disease. In 1998, over 700 healthy, mature trees were discovered on the upper slopes of Mount Šimonka in the Slanské Hills in Slovakia,Igor Kňazovický, 'Prince Charles had elms from Šimonka planted in the royal residence', Regional Tourism Organization, Horný Zemplín and Horný Šariš; 23 June 2020 where they are believed to have survived courtesy of their isolation from disease-carrying beetles rather than through any innate resistance; 50 clones of these trees, propagated by the Faculty of Forestry at the Technical University in Zvolen, were presented to the Prince of Wales (now King Charles III) during his state visit in 1995 and planted at his Highgrove Estate, in the Duchy of Cornwall estate, and at Clapham, Yorkshire, in 2001. They remain disease-free (2024),Geraint Richards, 'All the King's Elms: re-elming the Duchy of Cornwall estate', in Mark Seddon and David Shreeve, eds., Great British Elms (Kew Gardens, 2024), p.181Miroslava Babiaková, 'Teamwork behind the success story of Slovak elms in the royal gardens at Highgrove'; Faculty of Forestry, Technical University of Svolen, Slovakia, 31 October 2019; lf.tuzvo.skAndrej Barát, 'Les princa Charlesa zdobia slovenské bresty. Už 20 rokov' [: Prince Charles' Estate has been adorned with Slovak elms for 20 years], 13 February 2020, zurnal.pravda.sk however, the specimen donated by the Prince in 2004 to Butterfly Conservation's trial plantation at Great Fontley, Hampshire, succumbed to DED in 2020.Brookes, A. H. (2025). Great Fontley Elm Trial, 2025 Report. Butterfly Conservation, Lulworth, England.
The Swedish Forest Tree Breeding Association at Källstorp produced triploid and tetraploid forms of the tree, but these proved no more resistant to Dutch elm disease than the normal diploid form.
In trials conducted in Italy, the tree was found to have a slight to moderate susceptibility to elm yellows, and a high susceptibility to the elm leaf beetle Xanthogaleruca luteola.
Cultivation The wych elm is moderately shade-tolerant, but requires deep, rich soils as typically found along river valleys.Edlin, H. L. (1949). British woodland trees. Batsford, London. The species is intolerant of acid soils and flooding, as it is of prolonged drought.CAB International (2005) Forestry Compendium. CAB International, Wallingford, UK Although rarely used as a street tree owing to its shape, it can be surprisingly tolerant of urban air pollution, constricted growing conditions, and severe pollarding.
As wych elm does not sucker from the roots, and any seedlings are often consumed by uncontrolled deer populations, regeneration is very restricted, limited to sprouts from the stumps of young trees. The resultant decline has been extreme, and the wych elm is now uncommon over much of its former range. It is best propagated from seed or by layering stooled stock plants, although softwood cuttings taken in early June will root fairly reliably under mist.Beckett, K. & G. (1979). Planting Native Trees and Shrubs. Jarrold & Sons, Norwich, UK.
Wych elm was widely planted in Edinburgh in the 19th century as a park and avenue tree, and despite losses, it remains abundant there, regenerating through seedlings.Coleman, Max, ed., Wych Elm (Edinburgh, 2009) It was introduced to New England in the 18th century, and in the 19th century to Canada (as U. montana at the Dominion Arboretum, Ottawa), where a few old specimens survive,Non-cultivar Scots elm in Toronto; canadiantreetours.org and to Australia.Spencer, Roger, ed., Horticultural Flora of South-Eastern Australia, Vol. 2 (Sydney, 1995), Ulmus, p. 103-118
Uses
Lumber Wych elm wood is prized by craftsmen for its colouring, its striking grain, its 'partridge-breast' or 'catspaw' markings, and when worked, its occasional iridescent greenish sheen or 'bloom'. The bosses on old trees produce the characteristic fissures and markings of 'burr elm' wood.Coleman, Max, ed., Wych Elm (Royal Botanic Garden publications, Edinburgh, 2009) Bosses fringed with shoots are burrs, whereas unfringed bosses are burls.
Medicine
In 18th century France, the inner bark of Ulmus glabra, orme pyramidale, had a brief reputation as a panacea;Simon Morelot, Cours élémentaire d'histoire naturelle pharmaceutique..., 1800, p. 349 "the elm, pompously named pyramidal...it had an ephemeral reputation"Georges Dujardin-Beaumetz, Formulaire pratique de thérapeutique et de pharmacologie, 1893, p. 260 "it was taken as a powder, as an extract, as an elixir, even in baths. It was good for the nerves, the chest, the stomach — what can I say? — it was a true panacea."Gaston de Lévis, Souvenirs et portraits, 1780-1789, 1813, p. 240 It was this so-called "pyramidal elm bark" about which Michel-Philippe Bouvart famously quipped "Take it, Madame... and hurry up while it [still] cures." It still appeared in a pharmacopeia of 1893.
Notable trees
Possibly the oldest wych elm in Europe grew at Beauly Priory in Inverness-shire, Scotland; the tree succumbed to Dutch elm disease in 2022 and collapsed the following year. The priory was founded circa 1230, the tree already in existence.'Europe's oldest' wych elm tree falls down in Beauly Priory