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The elm cultivar Ulmus 'Hertfordensis Latifolia' was listed by Loudon in Arboretum et Fruticetum Britannicum (1838) as "the broad-leaved Hertfordshire Elm", and later mentioned, as Ulmus campestris hertfordensis latifolia, by Boulger in the Gardener's Chronicle (II. 12: 1879), but without description. It was considered "probably U. carpinifolia" (:U. minor) by Green, though broad leaves point to a possible Ulmus × hollandica hybrid identity. Hybrids of this type were once common in eastern Hertfordshire.

Description

Loudon's "broad-leaved" epithet distinguished the tree from his narrow-leaved Hertfordshire elm, U. 'Hertfordensis Angustifolia'.

• Leaf of unidentified broad-leaved elm (likely hybrid), Six Hills Common, Stevenage, Hertfordshire
• Unidentified broad-leaved elms, Six Hills Common, Stevenage, Hertfordshire

Pests and diseases

Though susceptible to Dutch Elm Disease, field elms (see Green's conjecture above) and their hybrids produce suckers and usually survive in this form in their area of origin.

Cultivation

The Woodland Trust records a small number of mature U. minor and Ulmus × hollandica surviving in Hertfordshire.

Synonymy

• Ulmus campestris hertfordensis latifolia: Boulger, in Gardener's Chronicle II. 12: 298 1879.

References

1. Arboretum et Fruticetum Britannicum, 3: 1396 1838
2. Boulger, George (1879). "British Elms". The Gardener's Chronicle.
3. Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
4. Richens, R. H., Elm (Cambridge, 1983), p.5
5. herbariaunited.org, herbarium specimen, broadleaved, long-petioled Hertfordshire elm, near Sawbridgeworth, Herts., 1941
6. "The Woodland Trust, Ancient Tree Hunt". Archived from the original on 2016-06-24. Retrieved 2016-05-26.

• Elm cultivars
• Ulmus