Summary
Ulmus pumila, or 'Poort Bulten,' is a Siberian elm cultivar that hails from Arboretum Poort Bulten in Losser, Netherlands. This tree was for many years mistaken for Planera aquatica or 'water elm' and commercially propagated under that name.[1]
| Ulmus pumila 'Poort Bulten' | |
|---|---|
 'Poort Bulten' at the Arboretum Poort Bulten, Losser, NL | |
| Species | Ulmus pumila |
| Cultivar | 'Poort Bulten' |
| Origin | Netherlands |
Description edit
The tree has smaller, paler, green leaves than the type, while the trunk has a very rough bark.[2][3][4] Planera and Ulmus fruit are easily distinguished,[5] 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 young Siberian elm with rough bark and leaves smaller than those of 'Pinnato-ramosa', that remain light green all summer, stands near the entrance to Rocheid Path at the northern end of Arboretum Avenue, Edinburgh (2018).[6] Though planted c.1980, the tree does not yet produce fruit (2021).
-
Possible 'Poort Bulten', Edinburgh -
Same tree, from Arboretum Avenue -
Bole of the same -
Dried leaves of the same (upper surface; colour faded in pressing) -
Lower surface
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
- Noordplant [3], Glimmen, Netherlands.
Notes edit
- ^ Ulmus pumila 'Poort Bulten', Morton Arboretum [1]
- ^ 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
- ^ Tree can be seen on Google Streetview, 'above' steps of 1 Reid Terrace, Edinburgh, or from Arboretum Av., near entrance to Rocheid Path.
External links edit
- U. pumila 'Poort Bulten', arboretum-poortbulten.nl