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Fraxinus excelsior
''Fraxinus excelsior'' — known as the ash, or European ash or common ash to distinguish it from other types of ash — is a species of ''Fraxinus'' native to most of Europe from Portugal to Russia, with the exception of northern Scandinavia and southern Iberia. It is also considered native in southwestern Asia from northern Turkey east to the Caucasus and Alborz mountains. The northernmost location is in the Trondheimsfjord region of Norway.〔Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.〕〔Den virtuella floran: (''Fraxinus excelsior'' distribution )〕 The species is widely cultivated and reportedly naturalized in New Zealand and in scattered locales in the United States and Canada (Nova Scotia, New Brunswick, Quebec, Massachusetts, Connecticut, New York, New Jersey, Maryland, Ontario, Ohio, Kentucky and British Columbia).〔(Kew World Checklist of Selected Plant Families, ''Fraxinus excelsior'' )〕〔(Biota of North America Program, ''Fraxinus excelsior'' )〕〔(Altervista Flora of the United States and Canada, ''Fraxinus excelsior'' )〕
==Description==
It is a large deciduous tree growing to (exceptionally to ) tall with a trunk up to (exceptionally to ) diameter, with a tall, domed crown. The bark is smooth and pale grey on young trees, becoming thick and vertically fissured on old trees. The shoots are stout, greenish-grey, with jet black buds (which distinguish it from most other ash species, which have grey or brown buds). The leaves are long, pinnate compound, with 7-13 leaflets, the leaflets long and broad, sessile on the leaf rachis, and with a serrated margin. The leaves are often among the last to open in spring, and the first to fall in autumn if an early frost strikes; they have no marked autumn colour, often falling dull green. The flowers open before the leaves, the female flowers being somewhat longer than the male flowers; they are dark purple, and without petals, and are wind-pollinated. Both male and female flowers can occur on the same tree, but it is more common to find all male and all female trees; a tree that is all male one year can produce female flowers the next, and similarly a female tree can become male. The fruit is a samara long and broad, often hanging in bunches through the winter; they are often called 'ash keys'.〔〔Mitchell, A. F. (1974). ''A Field Guide to the Trees of Britain and Northern Europe''. Collins ISBN 0-00-212035-6〕〔Mitchell, A. F. (1982). ''The Trees of Britain and Northern Europe''. Collins ISBN 0-00-219037-0〕 If the fruit is gathered and planted when it is still green and not fully ripe, it will germinate straight away, however once the fruit is brown and fully ripe, it will not germinate until 18 months after sowing (i.e. not until two winters have passed).〔Forestry Commission/ Edlin, H. L. ''Broadleaves'', HMSO, 1985, p36〕
European Ash rarely exceeds 250 years of age. However, there are numerous specimens estimated between 200 and 250 years old and there are a few over 250. The largest is in Clapton Court, England and is in girth. There are several examples over in Derbyshire alone.
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