A rapidly-growing fungus that produces a blackish colony with a yellowish-brown to brownish-gray reverse, within five days, when incubated at 25oC (77oF). They are found worldwide and can be isolated from soil, dead plants, paper and textiles. They are morphologically and physiologically closely related to Stachybotrys chartarum and has cytotoxicity similar to S. chartarum. It is unknown if they produce macrocyclic trichothecenes, however, they do produce simple trichothecenes (trichodermol and trichodermin) and phenylspirodrimanes. There have not been any reports of human infections.