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PENICILLITJM GLAUCUM. 



ONE OF THE MOST COMMON GREEN MOULDS. 



Origin. Widely distributed in the air, water, soil. 

 Color. Green. 



Mycelium. Consists of horizontally arranged, 

 straight or slightly wavy, jointed mycelial threads from 

 which the fruit hyphge rise vertically. 



Fruit-organs. --The ends of the fruit hyphae are 

 forked, and on the ends are the intermediate spore bear- 

 ers, or "sterigmae, also sometimes called basidia. Each of 

 these in turn bears a row of spores or conidia, so that the 

 appearance of the whole is that of a brush. 



Gelatin plates. The colonies form whitish floccules which rapidly 

 increase in size, and at the same time the center colors green. The gelatin is 

 liquified quite early. A low objective will show the above chai'acteristics of 

 growth. 



Bread flasks. Show a low, finely flocculent covering, which at first is 

 white but soon changes to a distinct green. 



Temperature. Optimum temperature is from 22 

 to 26 C. Does not grow at the temperature of the body. 

 Behavior to Gelatin. Liquefies. 

 Pathogenesis. Has no effect on animals. 



