A Chilian apocynaceous tree (Aspidosperma Quebracho);
   also, its bark, which is used as a febrifuge, and for dyspn/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.