AGARICUS. 



461 



living stems of silver fir, beech, etc., and on felled wood.^ In 

 the forest, on newly erected piles of firewood, the yellow stools 

 may frequently be found in every stage of development growing 

 from the cut billets, while they are [especially numerous on the 

 rotting useless timber left lying. In cellars or other moist 



Fig. 290. — Agancus adiposus. Destruc- 

 tion of Fir-wood. The deeply-corroded 

 cross-fissures contain white mycelium ; the 

 remainder of the wood is yellow, (v. 

 Tubeuf phot.) 



Fig. 291. — Agaricus adiposue. Destruc- 

 tion of Fir-wood. Later stage. The 

 corroded fissures no longer contain my- 

 celium, (v. Tubeuf phot.) 



chambers, the sporophores may be abundantly produced till 

 Christmas, but out-of-doors, August is the time of fructification. 

 The mycelium forms felted masses under the bark or in cracks 

 of the wood, and thence the sporophores arise as little pale- 

 yellow buttons, which gradually unfold and become differentiated 

 into cap and stalk. While quite young, they show the darker 



^ Pre^aous to the publication of v. Tubeuf s investigation the fungus had only 

 been observed on living beech and felled wood. 



