A rapidly-growing fungus that produces a hyaline later becoming light gray to grayish-brown colony within seven days when incubated at 25oC (77oF). It is found worldwide but is more common in humid temperate and subtropical regions. It is isolated primarily from plants and it is an airborne plant pathogen. It can be isolated from soil, salt marshes, sand, mangrove mud, sewage, fresh and salt water. There is evidence that it may be associated with allergic disease.