CLASSIFICATION OF THE MOLDS 



67 



dia of Hormodendrum are one-celled, while those of Clados- ' 

 porium, at least in the old and mature colonies, are in part 

 two-celled. 



Alternaria. — In this genus the spores are large and club- 

 shaped, occurring in chains, the youngest spore at the tip. 



B 



A. Hormodendrum. 



Fig. 46. — ^Hormodendrum and Cladospoeium. 

 B. Cladosporium. 



The mycelium is usually also brownish or fuscous in color. 

 The spores are many-celled and muriform. The species 

 Alternaria tenuis is abundant in moldy grains, in the soil, 

 and the cells are frequently found in laboratory air. 



NAEIA. 



