A rapidly growing fungus that produces a coarse wooly gray colony with a white reverse within four days, when incubated at 25oC (77oF). It has worldwide distribution and is very common. It is found in air, soil, swamps, dunes, sewage, caves, plants, bird feathers, compost , foodstuffs, and rabbit dung. It is one of the fungi responsible for a human and warm-blooded animal disease called zygomycosis. It attacks the lungs, nasal sinuses, and other organs in patients, especially in diabetic patients. It is capable of causing allergic disease.