Genus OmphaliaGENUS OMPHALIA
The members of this genus have white spores, and the gills growing down on the stem. They have a hard, tough rind to the stem, which distinguishes them from the genus Clitocybe, which has fleshy stems.
Omphalia umbellifera is a small species, with a cap about an inch broad. It is the common mushroom on the top of Mount Marcy, the highest mountain in the State of New York.