Example of Thick Bark in South America (IMAGE) Princeton University Caption Bark of a tree species found in the Brazilian Cerrado, which can burn every 3-7 years and contains some of the thickest barked species in the world, with Connarus suberosus having 30 percent of its stem diameter consisting of bark. Credit Photo courtesy of Adam Pellegrini Usage Restrictions Photo courtesy of Adam Pellegrini License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.