Penicillium roqueforti - Information from Wikipedia on this mould, a constituent of Roquefort, Stilton and other blue cheeses. - http://en.wikipedia.org/wiki/Penicillium_roqueforti
Penicillium - Information from Wikipedia including a list of the several species of ascomyceteous fungi in this genus. - http://en.wikipedia.org/wiki/Penicillium
Penicillium chrysogenum - Information from Wikipedia on this mold, its science and history, genetics and evolution. - http://en.wikipedia.org/wiki/Penicillium_chrysogenum