Collybia, possibly Collybia maculata
according to Bill Neill. Growing in mixed woods area. The stem did not
break cleanly. The largest cap was about 3".
The gills are free. The stem has hollow center. Flesh white.
Underside. Looks like free gills but
Younger and about 1.5" cap.
Underside of the younger. Very close
Spore print cream. Larger spore
measured 6.7 x 4.8 micons.