Part Used---Bark. 
Habitat---Chile and Argentina, Bolivia, Southern Brazil.
History---Quebracho is an evergreen tree which sometimes rises to 100 feet, with an erect stem and wide-spreading crown. The wood of all the species of this genus is valuable, and the name is due to its hardness, being derived from two Spanish words, quebrar and hacha, meaning 'the axe breaks.' It is used for tanning.
The bark was not introduced into Europe until 1878, though was for long used in South America as a febrifuge. Commercially, it is met with in large, thick pieces covered on the outside with a very thick and rough, corky layer of a greyish-brown colour, and deeply divided by furrows and excavations. The inner bark is greyish or yellowish, smooth or somewhat fibrous, and often with small, black spots. The taste is very bitter, but there is scarcely any odour.
Two other plants are known as Quebracho: Schinopsis Lorenzii, the wood of which is sold in commerce as 'quebracho wood,' and Iodina rhombifolia, 'quebracho flojo,' the wood and bark of which are sometimes substituted for the 'quebracho colorado.'
Constituents---Contains six alkaloids: Aspidospermine, Aspidospermatine, Aspidosamine, Quebrachine, Hypoquebrachine and Quebrachamine. All agree that quebrachine is the most active
ASTHMA- It is the Digitalis of the lungs. An effective remedy in many cases of asthma. It stimulates the respiratory centres and increases the oxygen in the blood . Want of breath during exertion is the guiding symptom. Cardiac asthma Uremic dyspnea
DOSE- First trituration or mother tincture