42 Structure and Classification of Micro-organisms 



THE MOLDS, BRANCHED FUNGI OR HYPHOMYCETES 



In this group it is customary to place a miscellaneous collection 

 of organisms having in common the formation of a well-marked 

 mycelium, but being so diversified in other respects as to place them 

 in widely separated groups in the systematic arrangement of the 



^^,^.^-=^ 



Fig. lo. — Oidium, showing the various vegetative and reproductive elements. :| 



X 3 so (Grawitz). • i 



fungi. Some are correctly placed among the "Imperfect fungi," 

 some among the Ascomycetes, and some among the Phycomy- 



Fig. II.— Oidium (Kolle and Wassermann). 



cetes. They are all active enzymic agents and produce fer- 

 mentative and putrefactive changes. 



I. Achorion.— The organisms of this genus are characterized by 

 a more or less branched hypha, 3 to 5^1 in diameter, which breaks up 

 after a time into rounded or cuboidal spores. The Athorion 



