Tabebuia impetiginosa Bark Source & Identity
The botanical entity is Tabebuia impetiginosa Mart. ex DC., a large tree of the Bignoniaceae that bursts into pink-purple bloom on bare branches, known as lapacho, ipê roxo and taheebo. The part used is the bark, mainly the inner layer. Wood, leaf and flower are not part of this pau d’arco extract. Some floras place the species in Handroanthus.
Pau d’arco is applied to more than one tree, including yellow-flowered relatives, so a specification should state the Latin binomial. The inner bark holds naphthoquinones such as lapachol, together with anthraquinones, flavonoids and phenylethanoid glycosides, named here only as families. Their levels depend strongly on tree age and species.












