A rapidly-growing fungus that produces a yellow-green colony, within five days, when incubated at 25oC (77oF). It may produce an earthy odor. It is the most widely distributed of the Chaetomium species. It is found worldwide, mainly in the temperate zone. It is found in dead and decaying plant debris, coarse fodder, bird nests and feathers, salt marshes, sewage sludge, and on wood and plywood. It may be associated with allergic disease.