Ulmus pumila 'Poort Bulten'
| Ulmus pumila 'Poort Bulten' | |
|---|---|
 'Poort Bulten' at the Arboretum Poort Bulten, Losser, NL | |
| Species | Ulmus pumila |
| Cultivar | 'Poort Bulten' |
| Origin | Netherlands |
Ulmus pumila, or 'Poort Bulten,' is a Siberian elm cultivar propagated from a tree in Arboretum Poort Bulten in Losser, Netherlands. The original, planted c.1912 by landscape architect Leonard Springer, was included in what was mainly a collection of evergreens, most of which were felled for firewood during World War II. Following a post-war inventory error, for many years the tree was mistaken for Planera aquatica or 'water elm' and commercially propagated under that name.[1] Later research determined it an U. pumila form from Mongolia.[2]
Description
[edit]The tree has smaller, paler green leaves than the type, while the trunk has a very rough bark.[3][4][5] Planera and Ulmus fruit are easily distinguished,[6] so the identity confusion in Losser suggests that the original specimen was slow to produce seed.
Pests and diseases
[edit]See under Ulmus pumila.
Cultivation
[edit]'Poort Bulten' is not known to have been introduced to North America or Australasia.
Putative specimens
[edit]A Siberian elm with rough bark and leaves smaller than those of 'Pinnato-ramosa', that remain light green all summer, matching those of 'Poort Bulten', stands near the entrance to Rocheid Path at the northern end of Arboretum Avenue, Edinburgh (2018).[7] Though planted c.1980, the tree does not yet produce fruit (2024).
-
Putative 'Poort Bulten', Edinburgh (2016) -
Same tree, from Arboretum Avenue -
Bole of the same -
Dried leaves of the same (upper surface; colour faded in pressing) -
Lower surface
Notable trees
[edit]The original still stands (2024). When planted in 1912 it stood among other elms at the back of the park, but following a change of main entrance, it now stands at the front.[2]
Synonymy
[edit]- Planera aquatica in error.
Accessions
[edit]- Europe
- Arboretum Poort Bulten [2], Acc. no. LOS0252, Losser, Netherlands.
- Wijdemeren City Council, Elm Arboretum, 2 trees planted 2019: Brilhoek and Hornhof cemetery, Nederhorst den Berg
Nurseries
[edit]Europe
[edit]Notes
[edit]- ^ Ulmus pumila 'Poort Bulten', Morton Arboretum [1]
- ^ a b Toine van der Heijden, 'Siberian elm', Poort Bulten, December 2021; zakenkrant.nl
- ^ systematics.mortonarb.org/ulmus/elmCultivar.270.html
- ^ Ulmus pumila 'Poort Bulten' (Siberische iep), photo gallery, arboretum-poortbulten.nl
- ^ "Herbarium specimen - L.1587208". Botany catalogues. Naturalis Biodiversity Center. Ulmus formerly labelled Planera aquatica (specimen from Zuiderpark, Den Haag, 1955); "Herbarium specimen - L.1582326". Botany catalogues. Naturalis Biodiversity Center. Ulmus formerly labelled Planera aquatica (specimen from Hillier & Sons, Winchester, 1952); "Herbarium specimen - L.1582325". Botany catalogues. Naturalis Biodiversity Center. Ulmus formerly labelled Planera aquatica (specimen from Arboretum national des Barres, Nogent-sur-Vernisson, 1949)
- ^ Wilkinson, Gerald, Epitaph for the Elm (London, 1978), p.47
- ^ Putative 'Poort Bulten', Arboretum Av., Edinburgh; seen 'above' steps of 1 Reid Terrace - Google Maps, July 2019, access date: 27 December 2024