FIG. 35. Armillaria mellea, a Basidiomycete forming 

 rhizomorphs. 2, section through a sporophore, a, pileus ; 

 b, lamellae or gills ; c, ring or annulus ; d, black, cord-like 

 strands of compacted mycelium or rhizomorphs ; 3, portion 

 of hymenium or spore-bearing surface of a gill, , basidium 

 bearing four spores ; 4, portion of a root of a tree with 

 branching rhizomorphs of the fungus surrounding it ; at a, a 

 cluster of young sporocarps are springing from a rhizo- 

 morph ; 5, section through a rhizomorph, showing the 

 thick-walled hyphae forming the rind, and the colourless 

 thin-walled hyphae of the central portion. Figs. 2 and 4, 

 nat. size ; figs. 3 and 5, mag. 



