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 Boulger may refer to: *Abraham Boulger (1835–1900), Irish officer, recipient of the Victoria Cross *Demetrius Charles Boulger (1853–1928), British author *E. V. Boulger (1846–1910), Irish academic, Professor of Classics in Adelaide *George Si ...

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 ''Ulmus'' × ''hollandica'' Mill. , often known simply as Dutch elm, is a natural hybrid between Wych elm ''Ulmus glabra'' and field elm ''Ulmus minor'' which commonly occurs across Europe wherever the ranges of the parent species overlap. In Eng ...

'' 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'. File:English Elm (Ulmus minor 'Atinia')? (23985369229).jpg, Leaf of unidentified broad-leaved elm (likely hybrid), Six Hills Common, Stevenage, Hertfordshire File:English Elm (Ulmus minor 'Atinia')? (24057588850).jpg, Unidentified broad-leaved elms, Six Hills Common, Stevenage, Hertfordshire

Pests and diseases

Though susceptible to Dutch Elm Disease,

field elm ''Ulmus minor'' Mill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention. Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern ...

s (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

{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed Elm cultivars Ulmus articles missing images Ulmus