''Ulmus'' × ''arbuscula''
| Ulmus × arbuscula | |
|---|---|
| Hybrid parentage | U. glabra × U. pumila |
| Origin | Russia |
Ulmus × arbuscula E. Wolf is a putative hybrid of Ulmus scabra (: glabra) and Ulmus pumila raised from seed collected from a large wych elm in the St. Petersburg Botanic Garden in 1902.[1][2] A similar crossing was cloned (FL025) by the Istituto per la Protezione delle Piante (IPP), Florence, as part of the Italian elm breeding programme circa 2000.
Description
The St. Petersburg tree bore leaves 17–75 mm long with 20 lateral veins, side shoots <125 mm long and leader shoots <170 mm long, and was described as 'a shrubby tree with pleasing foliage and branches appearing quite decorative'.[2]
Ulmus FL025 (glabra x pumila) leaf, Cams Bay, Fareham, England
Ulmus FL025 (glabra x pumila) leaf, same tree
Ulmus FL025 Bark of Cams Bay tree
Ulmus FL025 structure
Pests and diseases
A tree at the Ryston Hall arboretum,[3] Norfolk, listed as Ulmus arbusculata[4] and reputedly obtained from the Späth nursery in Berlin before 1914,[4] was killed by the earlier strain of Dutch elm disease prevalent in the 1930s. However, 'Arbuscula' or 'Arbusculata' does not appear in known Späth lists from the early 20th century.[5][6][7]
Cultivation
A specimen, labelled Ulmus arbuscula Wolf and described as a large tree, stood in the Nymphenburg Palace Park, Munich, in the mid-20th century.[8][9] Two trees survive in eastern European arboreta (see 'Accessions'). U. × arbuscula is not known to have been introduced to North America or Australasia.
Etymology
Arbuscula translates as sapling or bush. [10]
Accessions
- Europe
- Butterfly Conservation Hants & IoW Branch elm trials, Cams Bay, Fareham, UK. One specimen of IPP clone FL025 planted circa 2005.
- Grange Farm Arboretum, Sutton St James, Spalding, Lincolnshire, UK. Acc. no. 1097 (grown from seed).
- Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. nos. 18093, 18094. Planted 1964, no details available.[11]
- Strona Arboretum, University of Life Sciences, Warsaw, Poland.
References
- ↑ Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain and Ireland. Vol. 7, p.1827, Private publication, Edinburgh 1913. Reprinted 2014, Cambridge University Press, ISBN 978-1-108-06938-0
- 1 2 Wolf, Egbert (1910). "Neue Gehölze". Mitteilungen der Deutschen Dendrologischen Gesellschaft.
- ↑ rystonhall.co.uk/
- 1 2 Ryston Hall Arboretum catalogue. c. 1920. pp. 13–14.
- ↑ Katalog (PDF). 108. Berlin, Germany: L. Späth Baumschulenweg. 1902–1903. pp. 132–133.
- ↑ Späthbuch 1720-1920, p.263
- ↑ Späth, Ludwig (1930). Späth-Buch, 1720-1930. Berlin: Self published. pp. 311–313, 351–352.
- ↑ bioportal.naturalis.nl, specimen L.1590714
- ↑ bioportal.naturalis.nl, specimen L.1590713
- ↑ Wordsense translation from Latin.
- ↑ Hortus Botanicus Nationalis, Salaspils, Latvia, Accessions List 2006
External links
- "Herbarium specimen - L.1590713". Botany catalogues. Naturalis Biodiversity Center.
- "Herbarium specimen - L.1590714". Botany catalogues. Naturalis Biodiversity Center.