Fig. 48. Armillaria mtllea. 2, section through a plant, 

 a, pileus ; b, gills ; c, ring; d, b'ack cordlike strands of my- 

 celium ; 3, portion of hymenium or spore-bearing surface of 

 the gills ; a, basidium bearing four spores, x 300; 4, portion 

 of a root with branching strands of the mycelium surround- 

 ing it ; at a, a cluster of young fungi are springing from the 

 mycelium ; 5, section through the black rliizomorph or my- 

 celium, showing the thick-walled cells forming the outer 

 black rind, and the thin-walled, colourless cells forming the 

 inner portion, x 400. 



