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''Salix reticulata'', the net-leaved willow, or snow willow,〔Sierra Nevada Wildflowers, Karen Wiese, 2nd Ed., 2013 p. 197〕 is a dwarf willow, native to the colder parts of Europe, North America, and Northern Asia. It is found in the western United States (''Salix reticulata'' subsp. ''nivalis''), including the Sierra Nevada and Rocky Mountains. In Europe it extends south through the Carpathian Mountains and Alps to the Pyrenees and the mountains of Macedonia.〔(Species account from ARS Germplasm Resources Information Network (GRIN) ) . accessed 5.14.2013〕〔New Flora of the British Isles; Clive Stace; Third edition; 2011 printing.〕〔Willows and Poplars of Great Britain and Ireland, BSBI Handbook No. 4; Meikle; 1984.〕 It is common in Canada, Greenland and Finland, and present but rare in Scotland.〔〔 The plant grows on wet, often slightly calcareous, rocks and ledges. ==Description== ''Salix reticulata'' is a dwarf, prostrate, deciduous shrub growing to tall by broad, forming loose open mats with extensive, much-branched, underground stems. The exposed stems can rise to high. The twigs are slightly hairy at first, then hairless and dark reddish-brown later. Leaves are 1.2 cm to 5 cm long, 1 to 3.5 cm wide; densely hairy at first, becoming hairless at least on the upper side. The leaves have a conspicuous network of veins. In Spring, slender yellow catkins with pink tips appear.〔〔〔 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 reticulata」の詳細全文を読む スポンサード リンク
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