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''Sorbus domestica'' (service tree, or sometimes true service tree to distinguish it from the wild service tree; syn. ''Cormus domestica'' (L.) Spach) is a species of ''Sorbus'' native to western, central and southern Europe, northwest Africa (Atlas Mountains), and southwest Asia (east to the Caucasus).〔Rotach, P. (1995). Service tree ''Sorbus domestica'' Technical guidelines for genetic conservation and use. EUFORGEN. Available (online (pdf file) )〕〔Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.〕〔Mitchell, A. F. (1974). ''A Field Guide to the Trees of Britain and Northern Europe''. Collins ISBN 0-00-212035-6〕〔Hampton, M., & Kay, Q. O. N. (1995). ''Sorbus domestica'' L., new to Wales and the British Isles. ''Watsonia'' 20 (4): 379-384. Available (online (pdf file) )〕〔Hampton, M. (1996). Sorbus domestica L. - comparative morphology and habitats. ''BSBI News'' 73.〕 It is a deciduous tree growing to 15–20 m (rarely to 30 m) tall with a trunk up to 1 m diameter, though can also be a shrub 2–3 m tall on exposed sites. The bark is brown, smooth on young trees, becoming fissured and flaky on old trees. The winter buds are green, with a sticky resinous coating. The leaves are 15–25 cm long, pinnate with 13-21 leaflets 3–6 cm long and 1 cm broad, with a bluntly acute apex, and a serrated margin on the outer half or two thirds of the leaflet. The flowers are 13–18 mm diameter, with five white petals and 20 creamy-white stamens; they are produced in corymbs 10–14 cm diameter in late spring, and are hermaphrodite and insect pollinated. The fruit is a pome 2–3 cm long, greenish-brown, often tinged red on the side exposed to sunlight; it can be either apple-shaped (f. ''pomifera'' (Hayne) Rehder) or pear-shaped (f. ''pyrifera'' (Hayne) Rehder).〔〔〔〔 ==Ecology== It is generally rare, being listed as an endangered species in Switzerland and Austria, and uncommon in Spain.〔 In the UK, one very old tree that existed in the Wyre Forest before being destroyed in 1862 used to be considered native, but it is now generally considered to be more likely of cultivated origin, probably from a mediaeval monastery orchard planting.〔 More recently, a small population of genuinely wild specimens was found growing as stunted shrubs on cliffs in south Wales (Glamorgan) and nearby southwest England (Gloucestershire).〔〔 It is a very rare species in Britain, occurring at only a handful of sites. Its largest English population is within the Horseshoe Bend Site of Special Scientific Interest at Shirehampton, near Bristol. A further population has been discovered growing wild in Cornwall on a cliff in the upper Camel Estuary.〔(【引用サイトリンク】first1=David )〕 It is a long-lived tree, with ages of 300–400 years estimated for some in Britain.〔 The largest and perhaps one of oldest known specimen in Europe is on "oskeruše" educational trail near the town of Strážnice in the province of Moravia, Czech Republic. Its trunk measures in circumference, with a crown high and across. It is estimated to be around 450 years old. http://www.treeforeurope.com/ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sorbus domestica」の詳細全文を読む スポンサード リンク
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