Ulmus × androssowii
| Ulmus × androssowii | |
|---|---|
 Uzbekistan Elm, Samarkand | |
| Hybrid parentage | U. minor var. umbraculifera × U. pumila |
| Origin | Uzbekistan |
Ulmus × androssowii R. Kam. , commonly known as the Uzbekistan Elm, is probably an artificial hybrid. According to Lozina-Lozinskaia [1] the tree is unknown in the wild in Uzbekistan, and apparently arose from a crossing of U. densa var. bubyriana Späth (:now Ulmus minor 'Umbraculifera') and the Siberian Elm Ulmus pumila.
Description
The tree grows to a height of 20 m and is distinguished by its very dense spherical crown and pubescent leaves.[2] Its compact branch-structure helps the tree conserve moisture.[3]
Pests and diseases
Not known.
Cultivation
The hybrid has been widely planted in southern and western areas of the former Soviet Union, notably along the streets of Samarkand. Cold-hardy, it prefers a rich soil and moderate humidity.
Hybrid cultivars
Ulmus 'Karagatch', a hybrid cultivar from Turkestan, selected in the early 20th century and said to be a backcrossing of U. pumila and U. × androssowii. Introduced in the 1930s as U. 'Karagatch' (:'elm' in the Turkic languages), under which name it was planted at Kew. The Kew specimen, mature by the 1990s, had the appearance of a northern European field elm, more tall than broad, with a denser canopy than that of U. pumila 'Turkestan'.[4]
Synonymy
- Ulmus Androssowi: Litv. in Sched. Herb. Fl. Ross. 8: 23, no. 2445, t.2, 1922.
- Ulmus pumila f. androssowii (Litv.) Rehd.
Accessions
- North America
- Morton Arboretum, Illinois, USA. Acc. no. 353-72 (received as U. pumila f. androssowii (Litv.) Rehder).
- Europe
- Grange Farm Arboretum, Sutton St James, Spalding, Lincolnshire, UK. Grafted cuttings acquired 2013. Acc. nos. 1095, 1096.
- Hortus Botanicus Nationalis, Salaspils, Latvia. Acc. nos. 18165, 18166 (as U. pumila f. androssowii, both from Moscow).
References
- ↑ Sokolov (1951). Trees & Shrubs in the U.S.S.R (in Russian), 2: 506.
- ↑ Green, P. S. (1964). Registration of cultivar names in Ulmus. Arnoldia, Vol. 24. Arnold Arboretum, Harvard University.
- ↑ World Digital Library, wdl.org/en/item/5747/
- ↑ More, D. & White, J. (2013). Illustrated Trees of Britain and Northern Europe: A Complete Guide, p.409. Cassells, London.
External links
Photographs of and information on Uzbekistan Elm, World Digital Library