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alnus viridis
''Alnus viridis'' (green alder) is an alder distributed widely across the cooler parts of the Northern Hemisphere.
==Description==
It is a large shrub or small tree 3–12 m tall with smooth grey bark even in old age. The leaves are shiny green with light green undersurfaces, ovoid, 3–8 cm long and 2–6 cm broad.〔http://dictionaryonline.cc/what-does-green_alder-mean/〕 The flowers are catkins, appearing late in spring after the leaves emerge (unlike other alders which flower before leafing out); the male catkins are pendulous, 4–8 cm long, the female catkins 1 cm long and 0.7 cm broad when mature in late autumn, in clusters of 3–10 on a branched stem.〔(Flora of North America: ''Alnus viridis'' )〕 The seeds are small, 1–2 mm long, light brown with a narrow encircling wing.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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