It is the fifth and final herb Trufitus asks players to bring him during the Jungle Potion quest. If the herb is dropped by a monster, Trufitus will complain that the herb isn't fresh and that players must find one themselves.
"Identifying" herbs replaced with "cleaning" herbs. These require cleaning and a certain Herblore level to do so; the same Herblore level that was required to originally identify them.
Instead of unidentified herbs, they are named grimy herbs. Renamed from 'herb' to 'grimy snake weed'.
The "Identify" option was changed to a "Clean" option.
The examine text was changed from 'An unidentified herb.' to 'I need to clean this herb before I can use it.'