Salix schwerinii
Encyclopedia
Salix schwerinii is a species of willow
Willow
Willows, sallows, and osiers form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere...

 native to Northeastern Asia (from Kolyma
Kolyma
The Kolyma region is located in the far north-eastern area of Russia in what is commonly known as Siberia but is actually part of the Russian Far East. It is bounded by the East Siberian Sea and the Arctic Ocean in the north and the Sea of Okhotsk to the south...

 to Northeastern China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

). It is a shrub or a tree up to 10-15 m high with long and exceptionally narrow leaves, similar and closely related to Salix viminalis.
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