A moderately rapid-growing fungus that produces a yellowish-orange colony with a red reverse within seven days, when incubated at 25oC (77oF). May produce a yellow, orange, red, or brown diffusible pigment. The hyphae, conidiophores, and conidia are pigmented olivaceous-brown (dematiaceous). It is found worldwide and is very common. It is found in air, plants, grains, textiles, animals, foodstuffs, and paper products. It can cause allergic disease in humans.