Rokna tree fungus or rokna fungus was a deadly, blue fungus that grew on the rokna tree found on the Forest Moon of Endor. The sharp points protruding from this fungus could cause the death of those coming in contact with them. The highly addictive spice known as rokna blue was derived from rokna fungus. The Ewok Deej Warrick once cut his arm on some rokna fungus.
The To Save Deej storybook spells the fungus's name as "rockna."
- A Guide to the Star Wars Universe, Second Edition, Revised and Expanded
- "Endor and the Moddell Sector" — Star Wars Gamer 9
- The Complete Star Wars Encyclopedia