Schinopsis lorentzii is a species of flowering plant in the family Anacardiaceae.

[1][2] It is a hardwood tree known as red quebracho,[3] native of the Paraguayan subtropical area, which forms forests in Gran Chaco region of Argentina, in Paraguay, and Bolivia.

The indication santiagueño (from Santiago del Estero) is made to distinguish it from quebracho colorado chaqueño, a closely related species (Schinopsis balansae).

This tree is commercially very important due to its extremely hard and durable wood, and because of its tannin.

This massive exploitation has led to the loss of 85% of the original Quebracho forests on in Argentina.