THE AGARICACEAE OP MICHIGAN 



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Figure 2. — Structure of Agarics: (1) Vesicular trama of a section through a gill of a 

 Russula, showing also the hymenium, basidia, and a cystidium (adapted from Fayod) ; 

 (2) Parallel gill-trama-diagramatic ; (3) Interwoven gill-trama diagramatic; (4) Diver- 

 gent gill-trama diagramatic; (o)Section of Amanita, showing volva, annullus and scales 

 on the pileus. 



