1st time spotted, at base of log after rain, 2-1/2 inches high. 6/14 Photos show damage from slugs - exposing gills. June 16 cap 5.5 to 6 cm diameter, yellow toward center, membrane hanging from margin, stipe hollow with ring, brittle, staining slightly brown or reddish in photos when touched, gills dark chocolate brown. All parts of mushroom extremely fragileFungarium â" NIH and Regional mycoflora #9