Rokna tree fungi.
The rokna tree fungus, alternatively called rokna fungus, was a hazardous, blue-colored fungus. It grew upon the rokna tree located on the Forest Moon of Endor. Contact with the sharp points that extended from this fungus could result in death. Rokna blue, a highly addictive spice, was created using rokna fungus. The Ewok named Deej Warrick once suffered a cut on his arm from rokna fungus.
In the children's book, To Save Deej storybook, the fungus's name appears as "rockna."