This chapter of the Deep Rock Galactic guide has all the information about Boolo Cap - where to find it, how to identify, and what it can be used for.
Boolo Cap is one of the additional resources available in Deep Rock Galactic. These distinctive mushrooms with long narrow legs have purple-cyanide caps that glow in the dark - they are easy to locate. Collect Boolo Cap to complete a side objective in the missions.
Boolo Cap can be found throughout the planetary system. They usually grow near the ground, but can sometimes appear high above it making them difficult to access for characters without zip lines or platforms.