These brown pods grow from the network of veins that runs through this world. After a while, once they get heavy with ripeness, gravity rips them down and they explode as they hit the floor, spreading their seed and damaging any creature or plant in their wake. When a creature tries to bite at them or if they get disturbed enough while still growing from their branches, they will swell up and also explode. The Brown Pod is another one of the many different plants you'll find in my upcoming game "Enter The Flesh Again".