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Guaiacum OfficinaleThe wood of this tree is called Lignum Vitae. A resin, called gum guaiacum, exudes from the stem, and is otherwise obtained from the wood by artificial means. It is of a greenish-brown color, with a balsamic fragrance, and is remarkable for the changes of color it undergoes when brought into contact with various substances. Gluten gives it a blue tint: nitric acid and chlorin change it successively to green, blue, and brown. The resin is used medicinally as also are the bark and wood. Next: Guazuma Tomentosa Previous: Grias Cauliflora
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