Penicillium (from Latin penicillus: paintbrush)'s a genus of ascomyceteous fungi that includes: Penicillium bilaiae, which's an agricultural inoculant. Penicillium camemberti, which's used in the production of Camembert and Brie cheeses. Penicillium candida, which's used in making Brie and Camembert. Penicillium chrysogenum (previously known as Penicillium notatum), which produces the antibiotic penicillin. Penicillium digitatum, a plant pathogen, especially of Citrus fruits Penicillium ex… (More on Penicillium)