Naucoria semiorbiculareis ?? Pileus convex-expanded, 2.4 cm, warm buff slightly darker on disc or uniform, smooth or margin slightly sulcate; gills ventricose, adnate to sinuate adnate, brownish, close; stipe cartilaginous, silky fibrous, concolor or lighter, 6 cm x 2-5 mm tapering upward or more orless equal. Among grasses beside ties of tram-line Costa Rica: Limon, Castilla 20 m., Dodge "??30" 7237