MYCOLOGIA 



Vol. XI March, 1919 No. 2 



FURTHER NOTES ON THE SPORADIC AP- 

 PEARANCE OF NON-EDIBLE MUSH- ^;tl 

 ROOMS IN CULTIVATED MUSH- /^/"^ 

 ROOM BEDS by. 



Michael Levine \ A/ 



(With Plate 4) 



To the student of fleshy fungi the winter season can be ased 

 to great advantage in collecting and studying the Agarics and 

 different forms of Pezizas which appear in cutlivated mushroom 

 beds. In a previous paper^ I pointed out that a number of 

 agarics appear besides Agaricus campesins in cultivated mush- 

 room beds and that in a number of cases rather uncommon mush- 

 rooms are found which appear to be confined to the mushroom 

 house or appear but rarely outside of mushroom culture beds. 

 At present the fungus Panaeolns venefiosus Murrill interesting 

 for its toxicological properties, is known only from mushroom 

 beds in which the cultivated mushroom is grown. In the present 

 note I wish further to add to the list of names of fungi which may 

 be found in mushroom houses. 



In the spring season of 1918, in New York, there commonly 

 appeared in beds well illuminated, somewhat dry, and shortly 

 after casing, a great number of small white mushrooms which at 

 first glance gives one the impression of seeing large spots of white 

 felt covering the soil. On closer examination it is found that the 



1 Levine, M. The sporadic appearance of non-edible mushrooms in cul- 

 ture of Agaricus compestris. Bull. Torr. Club. Feb., 19 19. 



^- . The physiological properties of two species of poisonous mush- 

 rooms. Mem. Torr. Club 17: 176-201. pis. 1-2. 1918. 



[Mycologia for January (11 : 1-50) was issued December 21, 1918.] 



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