Leucoagaricus gongylophorus

Leucoagaricus gongylophorus is a mushroom cultivated by certain leafcutter ants. Like other species of fungi cultivated by ants, "L. gongylophorus" produces gongylidia, nutrient-rich swellings upon which ants feed. The fungus is completely dependent on ants for survival, as the ants feed the fungus. Production of mushrooms occurs only once ants abandon the nest. 