Biology:Ulmus canescens
| Ulmus canescens | |
|---|---|
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| Bark and young leaves, Antal Ben Shaddad, Jerusalem | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Ulmus |
| Species: | U. canescens
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| Binomial name | |
| Ulmus canescens Melville
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| Synonyms | |
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Ulmus canescens Melville is a small deciduous tree occasionally known by the common names grey elm, grey-leafed elm, and hoary elm. Its natural range extends through the lands of the central and eastern Mediterranean, from southern Italy,[1] the islands of Sicily,[2] Malta,[3] Crete,[4] Rhodes[5] and Cyprus, to Turkey,[6] and as far south as Israel, where it is now considered rare and endangered in the wild.[7] The tree is typically found amidst the comparatively humid coastal woodlands and scrublands.
Taxonomy
The taxonomy of the tree remains a matter of contention; some authorities, notably Richens, treated it as a subspecies of Ulmus minor.[8][9]
Description
The tree is comparatively small, < 20 m high; the slender trunk, its bark coarsely fissured, supporting a rounded crown. The leaves are elliptic to ovate, bluntly toothed, and densely downy on the underside when mature, imbuing them with a distinctive greyish hue.[10] The young shoots also have a whitish-grey down.[11] The tree flowers in February and March, the round samarae, < 15 mm diameter, deeply notched at the outer end, ripen in April.[12][13]
Pests and diseases
U. canescens is highly susceptible to Dutch elm disease.
Cultivation
U. canescens is occasionally planted as a street tree in Israel, notably in Jerusalem near the Damascus Gate along the Prophets Road and Antal Ben Shaddad street. In Nazareth, a line of mature trees is found along the road leading to the Basilica. It is also planted in Jordan, especially Amman. [citation needed] There are no known cultivars of this taxon, nor is it known to be in commerce.
Accessions
- North America
- Morton Arboretum. Acc. no. 395-76
- Europe
- Grange Farm Arboretum, Sutton St James, Spalding, Lincs., UK. Acc. no. 826.
- Royal Botanic Garden Edinburgh, UK. Acc. no. 20090690. From seed wild collected in Israel.[14]
- Sir Harold Hillier Gardens, UK. Acc. no. 2009.0334. From seed wild collected in Israel.
References
- ↑ Richens, R. H., Elm (Cambridge 1983), p.18
- ↑ Scialabba, A., M. R. Melati, and F. M. Raimondo. "Taxonomic studies on the Sicilian elms: leaf structure of their species and hybrids." Bocconea 5.2 (1997): 493-504.
- ↑ Plant: Ulmus canescens (Hoary Elm): Wild Plants of Malta & Gozo - Plant: Ulmus canescens (Hoary Elm), accessdate: October 27, 2016
- ↑ 'Canescens' in Crete, (1) in the Apokoronas region: George Sfikas, Trees and shrubs of Greece (Athens, 2nd ed. 2001) p.140; (2) in the Aghia Irene gorge in the Temenos region: Natural Europe Project, University of Crete, europeana.eu https://www.europeana.eu/portal/record/2023901/content_7af226a0_c461_4c99_8ce8_9de4e41fa3ac.html Small leaved Elm, Ulmus minor subsp. canescens | Avramakis, M.
- ↑ Flore of Rhodes: Ulmus canescens - Flore of Rhodes, accessdate: October 27, 2016
- ↑ 'Canescens' in Turkey, "Herbarium specimen - E00405654". Herbarium Catalogue. Royal Botanic Garden Edinburgh. http://data.rbge.org.uk/herb/E00405654.
- ↑ Flora of Israel Online: Ulmus minor Mill. | Flora of Israel Online, accessdate: October 27, 2016
- ↑ Richens, R. H. (1983). Elm. Cambridge University Press, England.
- ↑ Melville, R. (1978). On the discrimination of species in hybrid swarms with special reference to Ulmus and the nomenclature of U. minor (Mill.) and U. carpinifolia (Gled.). Taxon 27: 345-351
- ↑ Herbarium leaf-specimen, with rule: "Herbarium specimen - E00405654". Herbarium Catalogue. Royal Botanic Garden Edinburgh. http://data.rbge.org.uk/herb/E00405654.
- ↑ Diagnostic photographs of 'Canescens' in Malta: Hoary elm, maltawildplants.com
- ↑ Bean, W. J. (1980). Trees and shrubs hardy in Great Britain. 8th edition. Murray, UK.
- ↑ Melville, R. (1957). "Ulmus canescens: an eastern Mediterranean elm." Kew Bulletin: 499-502, 1957
- ↑ Royal Botanic Garden Edinburgh. (2017). List of Living Accessions: Ulmus [1]
External links
- Euforgen: elms[no|permanent dead link|dead link}}].
- Melville, R. (1 January 1957). "Ulmus canescens: An Eastern Mediterranean Elm". Kew Bulletin 12 (3): 499–502. doi:10.2307/4113729.
- "Ulmus canescens Melville; specimen from Thrace K000852646". Board of Trustees of the Royal Botanic Gardens, Kew. http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000852646.
- "Ulmus dalmatica Baldacci K000852645". Board of Trustees of the Royal Botanic Gardens, Kew. http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000852645.
- "Herbarium specimen - E00405654". Herbarium Catalogue. Royal Botanic Garden Edinburgh. http://data.rbge.org.uk/herb/E00405654. Sheet labelled Ulmus canescens Melville; specimen from Phaselis
- "Herbarium specimen - L.1582113". Botany catalogues. Naturalis Biodiversity Center. http://data.biodiversitydata.nl/naturalis/specimen/L.1582113. Sheet labelled U. minor Mill. subsp. canescens Melville; specimen from Adana, 1959
Wikidata ☰ Q7879426 entry
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