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MUCOR RHIZOPODIFORMIS. Lichtheim. 



Origin. White bread kept at 37 0. 



Color. At first white, but later becomes grayish. 



Mycelium. The mycelial threads are colorless and 

 thicker than in the preceding mucor, and are not jointed 

 or divided. 



Fruit-organs. The fruit hyphae occur in groups or 

 bunches, which adhere to the nutrient medium by means 

 of special root tufts. The large sporangia on the ends of 

 the hyphae contain rounded spores which are larger than 

 those of the preceding organism. 



Growth. Rapid. 



Gelatin plates Development is best when the gelatin is made with bread 

 infusion. It forms a coarse grayish-black mass which liquefies the gelatin. 



Bread flasks. The growth is lower than that of M. corymbifer, and is 

 grayish, owing to the dark colored sporangia. An ethereal or aromatic odor 

 is present. 



Temperature. Slow growth at 12 to 15, but 

 develops best at 37 0. 



Behavior to Gelatin. Liquefies. 



Pathogenesis. Has a similar effect as M. corymbi- 

 fer, but is more pathogenic. 



