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,