On CYA, colonies on the 7th day are 2.5-3.5 cm in diameter, velvety, with abundant gray-green sporification. Exudate is sometimes present in the form of small, colorless droplets. The reverse is brown, creamy brown, yellow brown, orange brown, beige. Malt extract agar (MEA) has velvety colonies, gray-green sporulation, reverse without pigmentation or brown. On agar with yeast extract and sucrose (YES) sporulation abundant, reverse from creamy yellow to brown.
Often forms sclerotia 180-400 microns in diameter, most abundant at 15-21 ° C on CYA and MEA.
Conidiophores are three-tiered, sometimes with an admixture of four-tiered, 400-1500 microns in length, 3.5-5 microns thick. Twigs 12-20 microns long. Metules 10-14 microns long, in whorls of 3-6. Flialoid filial, 9—11 × 3—3.5 microns. Conidia are mostly ellipsoidal, sometimes with slightly truncated ends, sometimes pear-shaped to cylindrical, 3-4 × 2.5-3 microns.
Differences from related species
It is determined by the long wide legs of conidiophores carrying three-tiered brushes. Producer of hrizogina and xantoepocin .
Within a species, two morphologically distinct lines are distinguished. The first group is the slow-growing inhabitants of natural habitats with a temperature maximum growth of 27 ° C, abundantly forming sclerotia. The second is fast-growing, sometimes forming brownish sclerotia, close to Penicillium olsonii , but differing from it by slower growth. Another close view is Penicillium astrolabium , distinguished by a black-brown reverse of colonies on CYA and an abundance of pigmented hyphae immersed in the environment with thickened cells resembling sclerotia.
Often found on meat products around the world. It is isolated from soil and other natural habitats.
Penicillium salamii G.Perrone , Frisvad , Samson & Houbraken , 193: 93 (2014).