Collybia 
Pileus tomentose, buffy brown quickly blackening, convex up 
to 3 cm diam; gills adnexed, close white, soon blackening in spots 
narrow; stipe flattened, subterete below tomentose pruinose, 
black 5 cm x 5 mm 
Specimens examined : 
Costa Rica: San Jose, Rancho Redondo Dodge & Thomas 5368 
