MONILIA NIGRA 



377 



the microscope, consists of radial hyphae. " The latter throw off a 

 conglomerate of bud cells, the mass of which increasing in thickness 

 soon gives the colony a starfish appearance. This primary growth 

 is usually succeeded by a secondary growth, due to the propagation 



Fig. 163-C. Magnified Colony of Monilia fusca. 



The Radiating Hyphae are covered with Bud-Cells and Dark Conidia (after Browne). 



of the bud cells, which, without the formation of hyphae, germinate 

 like yeast and cover the center of the colony with a white amoeba- 

 like film." When the colonies have attained a diameter of from 1 to 

 15 mm., the hyphae break up into clusters of dark conidia which give 



Fig. 163-D. Magnified Cells of Monilia fusca. 



In the middle is a branched part of the mycelium bearing 4 bud-cells; two of the 

 latter (one germinating) are shown at the left. I At the right is the end of one of 

 the hyphae, breaking up at the end into 3 conidia and in the middle into 2 

 oidia (after Browne). 



the colony a black color. This gives it the name of Monilia nigra. 

 If the colony stops growing before the conidial stage is reached, no 

 black color is assumed but the white remains. Under the microscope, 

 the hyphae are of the . ordinary branched type but more often are 

 studded with clusters of bud-cells. These latter are elliptical in shape 

 and may produce new hyphae, or propagate like a yeast. When the 



