(Crepidopus) ? Pleurotus commiscibilis Sacc. Syll. Pileus hygrophanous, 4-6 cm, convex, deeply umbilicate, margin striate to disc, white to cream buff, flesh thin; gills short decurren broad, subdistant, white; stipe varying from nearly lateral (then broa marginate behind) to central tapering downward, smooth, hygrophanous, white, fleshy, varying from 10 x 5 mm to 20 x 6-4 mm, oftentomentose at base, often cespitose. Rotting log in potrero.1 Edible, very delicious flavor. Specimens examined: Costa Rica: Heredia, Cerro Central de Zurqui 1700 m, Dodge Valerio & Thomas 6131.