Pau d'Arco Glycerite 4 oz by Herb PharmWe prepare our Pau d'Arco Glycerite from the dried inner bark of purple flowered Tabebuia impetiginosa trees, which is Custom Wildcrafted#8482; in the highland jungles of Paraguay. To assure optimal extraction of Pau d'Arco's bioactive compounds, we use only the inner bark which is hand harvested, carefully sun dried by the indigenous Guarani Indians and is then thoroughly extracted. These statements have not been evaluated by the Food and Drug