Agaricus on decaying bark (birch) Cromerghown. 13 July 1839 Subtusiated. Pileus minute, hemispherical, white, pruinose with a coat of fine white powder. Gills adnate, broad, sulphurous at the margin, pale. Stem pileate, white, broad at the base. Pileus 1/2-3/4 an inch in diameter, delicate, snow white, subtusiated immediately contracted at the margin; covered with a coarse sulphur powder. Gills few, broad, subdecurrent, pale. Stem 3/4-1 an inch high, pileate, the hairs largest below. Not little Flesh Stemulus large for the size of the pileus: subgibbous, pellucid, pale-brown.