Wych Elm (Ulmus glabra)

The wych elm (Ulmus glabra) is the only elm considered truly native to the British Isles and the dominant elm of upland Europe. Unlike the English elm, it reproduces by seed rather than by root suckers, which has shaped both its evolutionary trajectory and its response to Dutch Elm Disease.

Identification

Mature size: 80–120 feet at maturity, with a domed or somewhat irregular crown.

Form: A single trunk with broad, spreading branches forming a rounded or dome-shaped crown. Less columnar than English elm; less vase-shaped than American elm.

Leaves: The largest of any common elm — 3–7 inches long, broadly oval, often with three points at the tip (a tip plus two side lobes). Very rough upper surface (almost sandpapery). Strongly asymmetrical leaf base.

Bark: Smooth and grayish-brown when young; develops broad, shallow fissures with maturity. Less deeply furrowed than American or English elm.

Flowers and fruit: Reddish flower clusters in early spring, followed by distinctive large, papery, disc-shaped samaras (3/4 to 1 inch across) with the seed offset toward one side. Wych elm seeds are usually viable, unlike English elm.

Range and habitat

Wych elm is native across northern and central Europe, from Ireland and Scotland east through Scandinavia, the Balkans, and into central Asia. Its preferred habitat is upland woods, ravines, and stream sides — cool, moist sites with some shade. In Britain, it dominates in northern and western regions where field elm is sparse.

The name "wych" derives from Old English wice, meaning "pliable" or "bending" — referring to the flexible young branches once used for longbows.

Susceptibility to Dutch Elm Disease

Wych elm is highly susceptible to Ophiostoma novo-ulmi. The British population has suffered substantial losses, though somewhat less dramatically than English elm because:

Its upland habitat has fewer elm bark beetles (cooler temperatures slow beetle development)
It often grows as scattered individuals rather than in dense rows
It reproduces from seed, allowing continuous regeneration

Northern Scotland and parts of upland Scandinavia retain notable wych elm populations because cooler climates limit beetle activity.

Cultivars and ornamental forms

Several distinctive wych elm cultivars have been developed historically:

'Camperdownii' (Camperdown elm) — a famous weeping form discovered as a sport in Scotland in 1835. Always grafted onto a standard trunk, producing a domed weeping canopy. Most botanical gardens in temperate climates have one. As DED-susceptible as the parent species.
'Pendula' — another weeping form
'Lutescens' — yellow-leaved cultivar

These ornamental cultivars retain the species' DED susceptibility and require either active fungicide management or acceptance of eventual loss.

Cultural and ecological notes

Wych elm wood is dense, hard, and water-resistant — historically used for waterwheels, pumps, sea defences, and coffins. Wych elm seeds are an important early-spring food source for birds (the seeds ripen in May, before most other tree seeds). The deeply fissured bark of mature trees supports rich lichen communities.

In Norse mythology, the first woman (Embla) was created from a wych elm.

References

Mitchell, A. (1996). Trees of Britain & Northern Europe. HarperCollins.
Richens, R. H. (1983). Elm. Cambridge University Press.
Solla, A., et al. (2005). "Genetic variation and heritability estimates of Ulmus minor and Ulmus pumila hybrids for budburst, growth and tolerance to Ophiostoma novo-ulmi." Investigación Agraria: Sistemas y Recursos Forestales, 14(1), 122–130.