Jaddyyk moss was a dangerous, parasitic plant that was native to the Wookiee homeworld Kashyyyk. It grew in stalks and mounds on the floor of the Well of the Dead, giving an appearance of a long-furred Wookiee.
- Tyrant's Test (First appearance)
- The New Jedi Order: Agents of Chaos I: Hero's Trial (Mentioned only)
- The Complete Star Wars Encyclopedia (As "jaddyyk")
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