This is the bark of the Cedro Amargo or Cigar-box Tree, which Ranges from at least Guatemala to Colombia. It is prized for its aromatic wood and insect repelling resin. Meliaceae Family.
Cedro Amargo is a tree found through much of the northern Neotropics. It is prized for its aromatic wood used for purposes such as cigar boxes. Here, on Barro Colorado Island in Panama, it is known as Acuja.