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''Salix cinerea'' (grey willow; also occasionally large gray willow or grey sallow) is a species of willow native to Europe and western Asia.〔Meikle, R. D. (1984). ''Willows and Poplars of Great Britain and Ireland''. BSBI Handbook No. 4. ISBN 0-901158-07-0.〕〔Christensen, K. I., & Nielsen, H. (1992). Rust-pil (''Salix cinerea'' subsp. ''oleifolia'') - en overset pil i Danmark og Skandinavien. ''Dansk Dendrologisk Årsskrift'' 10: 5-17.〕 ==Plant== It is a deciduous shrub or small tree growing to high. The leaves are spirally arranged, 2–9 cm long and 1–3 cm broad (exceptionally up to 16 cm long and 5 cm broad), green above, hairy below, with a crenate margin. The flowers are produced in early spring in catkins 2–5 cm long; it is dioecious with male and female catkins on separate plants. The male catkins are silvery at first, turning yellow when the pollen is released; the female catkins are greenish-grey, maturing in early summer to release the numerous tiny seeds embedded in white cottony down which assists wind dispersal.〔〔 The two subspecies are:〔〔 *''S. c. cinerea'' - central and eastern Europe, western Asia, shrub to 4–6 m (rarely 10 m) tall, with smooth bark, leaves densely hairy below with pale yellow-grey hairs, stipules large, persistent until autumn *''S. c. oleifolia'' (Sm.) Macreight (syn. ''S. atrocinerea'' Brot.) - western Europe, northwest Africa, shrub or tree to 10–15 m tall, with furrowed bark, leaves thinly hairy below with dark red-brown hairs, stipules small, early deciduous Some overlap in the distributions (not indicated in the map, right) occurs, with both occurring in a broad band north to south through France, and scattered specimens of ''S. c. cinerea'' west to Ireland, western France, and Morocco; scattered specimens of ''S. c. oleifolia'' occur east to the Netherlands. Specimens of ''S. c. oleifolia'' in southern Scandinavia are planted or naturalised, not native. Intermediate specimens also occur.〔〔 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「Salix cinerea」の詳細全文を読む スポンサード リンク
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