Psathyrella cernua

Psathyrella cernua (Vahl ex Fr.) Moser Cap 2-4cm across, broadly convex; dark, watery brown; margin finely striate, almost white when dry. Gills adnexed, close; pallid then dull purple-brown. Stem 30-50 x 2-4mm; white. Flesh pallid. Odor not distinctive. Taste not distinctive. Spores ellipsoid, 7-8 x 4-5µ. Deposit purple-brown. Cystidia thick-walled. Habitat on fallen trees, especially poplars. Rather rare. Distribution uncertain. Season July-October. Edibility not known -avoid.