Stachybotrys chartarum

Stachybotrys chartarum (obsolete: Stachybotrys alternans and Stachybotrys atra) is a greenish-black mold that is commonly found outdoors and sometimes found in damp or flooded homes. It was originally described from the wall of a house in Prague in 1837 by Czech mycologist August Carl Joseph Corda. It requires constant moisture in order to grow.

Health problems related to this mold have been documented in humans and animals since the 1930s (and it is even considered a likely candidate for the Biblical condition mistranslated as "leprosy", tzaraath). More recently, S. chartarum has been linked with so-called sick building syndrome. However, the link has not been firmly established in the scientific literature.