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Ulmus canescens : ウィキペディア英語版 | Ulmus canescens
''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,〔Richens, R. H., ''Elm'' (Cambridge 1983), p.18〕 the islands of Sicily,〔'Canescens' in Sicily, herbmedit.org/bocconea/5-493.pdf〕 Malta,〔'Canescens' in Malta, maltawildplants.com/ULMC/Ulmus_canescens.php〕 Crete,〔'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 () ()〕 Rhodes〔'Canescens' in Rhodes, worldplants.webarchiv.kit.edu/rhodos/index.php?name=Ulmus%20canescens〕 and Cyprus, to Turkey,〔'Canescens' in Turkey, elmer.rbge.org.uk ()〕 and as far south as Israel, where it is now considered rare and endangered (). The tree is typically found amidst the comparatively humid coastal woodlands and scrublands. The taxonomy of the tree remains a matter of contention, some authorities treating it as a subspecies of ''Ulmus minor''.〔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〕 ==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. The young shoots also have a whitish-grey down.〔Diagnostic photographs of 'Canescens' in Malta: ''Hoary elm'', maltawildplants.com ()〕 The tree flowers in February and March, the round samarae, < 15 mm diameter, deeply notched at the outer end, ripen in April.〔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〕
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