The elm cultivar Ulmus 'Hertfordensis Latifolia' was listed by Loudon in Arboretum et Fruticetum Britannicum (1838) as "the broad-leaved Hertfordshire Elm",Arboretum et Fruticetum Britannicum, 3: 1396 1838 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.Richens, R. H., Elm (Cambridge, 1983), p.5herbariaunited.org, herbarium specimen, broadleaved, long-petioled Hertfordshire elm, near Sawbridgeworth, Herts., 1941
Description Loudon's "broad-leaved" epithet distinguished the tree from his narrow-leaved Hertfordshire elm, U. 'Hertfordensis Angustifolia'.
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.
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