| Ulmus minor sensu latissimo | |
|---|---|
| Details | |
| Cultivar | 'Koopmannii' |
| Origin | Turkestan |
The Field Elm Ulmus minor sensu latissimo cultivar 'Koopmannii' Lauche ex. Spath was cloned from a specimen raised from seed sent from Margilan, Turkestan by Koopmann to the Botanischer Garten Berlin [2] circa 1880. The tree was first listed in the Späth nursery (Berlin, Germany), catalogue no. 62, p. 6. 101, 1885, as Ulmus Koopmannii, and later by Krüssmann in Handb. Laubgeh. 2: 534, 1962, as a cultivar.
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The tree is said to resemble Ulmus minor subsp. minor 'Umbraculifera' in form, with a dense, oval crown and small, ovate leaves < 30 mm in length [1][2][3].
The tree is susceptible to Dutch elm disease.
'Koopmannii' was traditionally grown in cemeteries in Turkestan, where it occasionally reached a great size. It was marketed in Europe by Späth, and a specimen was once grown at Kew Gardens, where it performed rather poorly.