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Schinopsis balansae
''Schinopsis balansae'' is a hardwood tree known as willow-leaf red quebracho〔(【引用サイトリンク】title=USDA GRIN Taxonomy )〕 which forms forests in the subtropical Gran Chaco ecoregion of north-eastern Argentina, and Paraguay. It is also found in the wild Pantanal vegetation in Brazil. Some of its vernacular names are ''quebracho colorado chaqueño'' and ''quebracho santafesino''. Other species, like ''Schinopsis lorentzii'', bear the general name quebracho and have similar properties and uses. ''S. balansae'' shares its habitat with a species of the same genus, ''S. heterophylla'', and the two are often confused.
This tree can reach 24 metres in height and more than one metre in diameter. Its trunk is straight, with a brownish-gray bark. Its wood is extremely heavy (relative density = 1.2). Its main use is the extraction of quebracho extract, which is 63% pure tannin.
The tree was declared Argentina's "National Forest Tree" in 1956.
== Chemistry ==
Leuco-fisetinidin, a flavan-3,4-diol (leucoanthocyanidin) and a monomer of the condensed tannins called profisetinidins, can be extracted from the heartwoods of ''S. balansae''.〔(Condensed Tannins - The isolation and distribution of interrelated heartwood components of ''Schinopsis spp.''. D.G. Roux and E. Paulus, Biochem. J. (1961) 78, 785, 1961 )〕
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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