Grimy guam

A Grimy guam is a herb that has not yet been cleaned to make a clean guam. Grimy guams may be grown from a guam seed with a Farming level of 9. It is dropped by certain non-player characters. Cleaning a grimy guam requires an Herblore level of 3 and gives 2.5 Herblore experience. Clean guams are used to make Attack potions at level 3, Guthix rests (requires 2 clean guams) at level 18, and Super Fishing Explosive at level 31. They are also a secondary ingredient for a Macaw, at level 41 Summoning. Grimy guams may also be obtained from the Sorceress's Garden activity.

After the newly renovated Taverley and Member tutorial you can obtain these from Gelationous Abominations, as well.

Obtained from
This herb is extremely common and is dropped by many monsters, including:
 * Aberrant spectres
 * Catablepons
 * Cave crawlers
 * Turtles
 * Cave horrors
 * Chaos druids
 * Chaos druid warriors
 * Cockroaches
 * Blue dragons
 * Female H.A.M. members
 * Flesh Crawlers
 * Gelatinous abomination
 * Hill Giants
 * Hobgoblins
 * Ice warriors
 * Jogres
 * Kalphite workers
 * Killerwatts
 * Kurasks
 * Lesser demons
 * Men
 * Male H.A.M. members
 * Molanisks
 * Moss giants
 * Muggers
 * Otherworldly beings
 * Sorebones
 * Turoths
 * Vampires
 * Zezima
 * Wall beasts
 * Water elementals
 * White Knights
 * Woman
 * Zombies

Trivia

 * Guam is the name of an island in the western Pacific.

Grimy guam