Isolated from dead plants and cellulose materials. Although Stemphylium is rarely found growing indoors, it may be seen in dust as part of the normal influx of outdoor particles. Torula Reported to be allergenic . Looks like a velvety black meal on various surfaces. Found on dead plant stems and leaves, wood, dung, and several crops.
Spores are at their peak in the fall and late spring or early summer.
Rated as the second highest level of spores in the United States after Aspergillus . It is commonly found in soil, dead trees, pine needles, paper, unglazed ceramics. It often will grow on other fungi. It produces antibiotics which are toxic to humans. It has been reported to be allergenic .