penicillium clavigerum penicillium clavigerum penicillium clavigerum is a fungus species of the genus of penicillium which produces fumigaclavine a and fumigaclavine b penicillium clavigerum scientific classification kingdom: fungi division: ascomycota class: eurotiomycetes order: eurotiales family: trichocomaceae genus: penicillium species: p. clavigerum binomial name penicillium clavigerumdemelius 1923