Quebracho, a hardwood tree of South America. The name is Spanish for "break-ax." The red and white quebrachos, which grow in Brazil, Paraguay, Argentina, and Chile, are of commercial importance. The hard, close-grained wood is used for railway ties. Quebrachin, a drug obtained from the bark of the white quebracho, is used in treating asthma. Both the red and white species yield an extract of tannin used for tanning and dressing morocco and other fine leathers. The trees grow to a height of 50 to 70 feet (15 to 21 m) and have a diameter of up to 4 feet (1.2 m).

The red quebracho is Loxopterygium lorentii of the sumac family, Anacardiaceae. The white quebracho is Aspidosperma quebracho of the dogbane family, Apocynaceae.