I'ESTALOZZIA. 



493 



rind of young plants of spruce and silver fir, I succeeded in 

 finding near the place of constriction, a delicate mycelial stroma 

 enclosing some cavities (pseudopycnidia). Conidia were formed 

 inside these cavities and emerged to the exterior. They belong to 

 the genus Festalozzia, and have two brown median cells, a trans- 

 parent stalk-cell to which the long stalk is attached, and a 

 transparent terminal cell carrying two or three transparent thread- 

 like appendages (Fig. 303). (Termination results in the emission 

 of a strong germ-tube from one of the three lower cells. If at 

 any time the conidia dry up, the two clear transparent cells 



m,M 



Ftf). 30-\.—I''-.<l('fn:::,i /„,><,■■<( on Cliaiuotci/pari.^ MukUsU. ,\t the pl.iccs 

 marked X cainbiuin and rind have been killed, so that growth in thickness no 

 lonffcr takes place ; the hiffher parts, however, have continued to thicken, but 

 are gradually dying, (v. Tubeuf phot.) 



collapse and the appendages easily fall off, so that on material 

 of this kind the conidia are only two-celled and brown. The 

 mycelium after cultivation in nutritive gelatine soon produces 

 conidia. 



This fungus was found by Kostrup on beech, producing much 

 the same effects as just described. On this host it has been 

 found very destructive in young naturally regenerated forest, 

 the loss in Bavaria and Wurtemburg within very recent years 

 having been estimated at 30 per cent. It also occurs on ash, 

 sycamore, and other trees. 



P. funerea Desm. (TU-itain and U.S. America). The spores of 



