Report on Laccaria amethystina, newly confirmed as an ammonia fungus.

Laccaria amethystina was judged to be an ammonia fungus in accordance with the definition proposed by Sagara (1975). In 72 urea-treated plots, L. amethystina was found to fruit in the succession of the ammonia fungi, and its fruit bodies appeared about 300 times more densely inside than outside the plots. Thus the author concluded that L. amethystina satisfies the definition of the ammonia fungi. [ABSTRACT FROM AUTHOR]