Quebracho is a common name in Spanish to describe very hard (density 0.9–1.3) wood tree species. The etymology of the name derived from quiebrahacha, or quebrar hacha, meaning "axe-breaker". Species There are at least three similar commercially important tree species that grow in the Gran Chaco region of South America. the quebracho Schinopsis lorentzii (Syn.: Schinopsis marginata Engl., Schinopsis haenkeana Engl.); of the family Anacardiaceae; North Argentina, Paraguay and Bolivia; (the red quebracho, quebracho), quebracho-colorado santiagueño, red quebracho santiagueño, quebracho santiagueño (also known as quebracho cor(o)nillo, cor(o)nillo, quebracho macho, quebracho negro or moro, quebracho rojo, quebracho bolí, horco quebracho, quebracho serrano, quebracho montano, quebracho crespo, quebracho del cerro, quebracho colorado de las sierras o del cerro and quebracho cordobés) Schinopsis balansae; of the same family; Northeast Argentina, West-Central Brazil, Paraguay; (the willow-leaf red quebracho, red quebracho) quebracho-colorado chaqueño, red quebracho chaqueño, quebracho chaqueño, quebracho vermelho, quebracho vermelho chaqueño (also known as quebracho hembra or femea, quebracho santafesino, quebracho colorado santafesino, quebracho rubio) Schinopsis aff. heterophylla Ragonese & J.A.Castigl., the quebracho mestizo or quebracho colorado mestizo, horco quebracho; Northeast Argentina, Paraguay Schinopsis brasiliensis Engl., brazil red quebracho, quebracho-colorado, quebracho crespo; Brazil Schinopsis cornuta Loes., horned red quebracho, quebracho-colorado; Paraguay, Bolivia Schinopsis peruviana, quebracho-colorado (boliviano); Peru the white quebracho or quebracho blanco, quebracho amarillo, Aspidosperma quebracho-blanco of the family Apocynaceae; Paraguay, Argentina, Bolivia, West-Central Brazil Aspidosperma triternatum Rojas Acosta; North Argentina, Bolivia, Paraguay; quebracho blanco lagunero, quebracho blanco chico, quebrachillo blanco, chico or pardo and quebracho negro. Aspidosperma olivaceum Müll.Arg.; Southeast Brazil; quebracho blanco Aspidosperma parvifolium A.DC.; Venezuela; Aspidosperma australe Müll.Arg.; (quebracho amarillo) Aspidosperma tomentosum Mart.; Brazil; quebracho, quebracho blanco moroti These species provide tannin and a very hard, durable timber. Quebracho is sometimes used as a commercial name for the tannin derived from the trees or their timber. A further species, Jodina rhombifolia (Syn. Iodinia rhombifolia, the quebracho flojo (the loose, soft quebracho) or quebrachillo, quebrachillo flojo and sombra de toro, sombra de toro macho, quinchilin, quinchirin, of the family Santalaceae, is also sometimes mentioned. Other species with less economic significance are also locally known as quebracho or as quebrachillo or quebrachilla and could be found in other areas of Latin America : Acanthosyris spinescens (Mart. & Eichler) Griseb.; Santalaceae; Northeast Argentina, Uruguay, South Brazil; Acanthosyris falcata Griseb.; (quebrachill(a)o, quebracho flojo, sombra de toro (hembra)) Albizia carbonaria Britton; Fabaceae; El Salvador Astronium fraxinifolium Schott; Anacardiaceae; N. Colombia Athyana weinmannifolia (Griseb.) Radlk.;