The indusia are larger than in most of the related species, flat, perfectly smooth, orbicular with a very narrow sinus, and slightly erose-crenulate on the margin.
The spores are ovoid-reniform and have a narrow crenulate wing.
Crenulata means bearing notches, referring to the crenulate form of the gills, which are very distinct.
The gills are close, reaching the stem, and sometimes forming decurrent lines upon it, floccose crenulate on the edge, the short ones truncate at the inner extremity, white.
