Ulmus × hollandica 'Angustifolia'
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Ulmus × hollandica 'Angustifolia' is one of a number of hybrids arising from the crossing of the Wych Elm
Wych Elm
Ulmus glabra, the Wych elm or Scots elm, has the widest range of the European elm species, from Ireland eastwards to the Urals, and from the Arctic Circle south to the mountains of the Peloponnese in Greece; it is also found in Iran...

 U. glabra with a variety of Field Elm
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; its northern outposts are the Baltic islands of Öland and Gotland, although it...

 U. minor, first identified as Ulmus hollandica var. angustifolia by Weston
Richard Weston
Richard Weston was an English botanist.Weston was originally a thread-hosier of Leicester, but in some of his anonymous works describes himself as "a country gentleman". In 1773 he was living at Kensington Gore, but later was living at Leicester where he was secretary of the local agricultural...

  in Bot. Univ. 1: 315, 1770.
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