penicillium freii penicillium freii penicillium freii is a psychrophilic species of the genus of penicillium which produces xanthomegnin and patulin. penicillium freii occurs in meat, meat products, barley and wheat penicillium freii scientific classification kingdom: fungi division: ascomycota class: eurotiomycetes order: eurotiales family: trichocomaceae genus: penicillium species: p. freii binomial name penicillium freiilund, f.; frisvad, j.c. 1994