STROPHARIA EPIMYCES 



167 



pileus with a thick coat. The base of the stem is also much thick- 

 ened and does not become hollow. In many cases, there is a solid 



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mass of parasitised stem, veil, and gill tissue and no annular cavity 

 is formed, but often a more or less evident slit appears between the 

 gills and the veil, 



" The gills of the host plants attain nearly normal size and some- 



