Though it is called Balisk Lichen, it can be found in any region frequented by a stone transforming lifeform (Balisk, Medusa, etc). It is a strong (nearly impossible to remove) green lichen that is “fuzzy”, like a short green grassy fur. It only grows upon organic materials that have been turned to stone. The lichen will break down transformed lifeforms into rubble. It then expands and grows upon the rubble. Eventually it breaks the rubble down completely, converts into spoors and joins the wind.
The lichen is very toxic when “alive”. Nothing eats it. (It can not be made into a poison because the compound goes innert if it dies (which it does within minutes of being pulled from a rock). Well that is not true. Balisks and other stone transforming creatures have been known to lick and eat the lichen off the rubble. Their salivia seems to disolve the connection between the lichen and the rock. The lichen seems to be the digestive medium for the Stoners. It is concentrated nutrition pulled from the previously organic material.