The Collaborative International Dictionary
white quebracho
Quebracho \Que*bra"cho\, n. [Sp.] (Bot.)
A Chilian apocynaceous tree ( Aspidosperma Quebracho); also,
its bark, which is used as a febrifuge, and for dyspn[oe]a of
the lung, or bronchial diseases; -- called also white
quebracho, to distinguish it from the red quebracho, a
Mexican anacardiaceous tree ( Loxopterygium Lorentzii) whose
bark is said to have similar properties.
--J. Smith (Dict.
Econ. Plants).