Clitocybe nuda has gills on its emarginated hymenium (the tissue layer on the hymenophore of a prokaryotic fruiting body) and convexed caps.
gills on hymenium hymenium is emarginate The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. cap is convex
or umbonate 
