While cave fungus is normally grown in caverns as a reliable healing reagent, some caverns over the years have become irradiated. This resulted in the mutated cave fungus, which can be used to make black blood sausages and other consumables.
X-22 botanical garden - Four total, one in the ruined building on the ground floor, near the north wall. One is a few steps west of the building's entrance outside. One is near the foot of the steps and one is found on the remains of the second floor, on the southeast side.