Mycena alcalina (Fr.) Kummer. Much of the British material under this name has been found to be Mycena stipata. Nitrose-Helmling Mycène à odeur d'alcali. Cap 1–3cm across, conical expanding to broadly bell-shaped, grey-brown, lined when moist. Stem 20–65 x 1–3mm, concolorous with cap, smooth. Flesh thin, whitish. Taste mild, smell of ammonia. Gills pale grey with whitish edge. Cheilocystidia fusoid, thin-walled. Spore print white. Spores cylindric-ellipsoid, amyloid 8–12 x 4.5–6um. Habitat on stumps, usually of conifers. Season autumn. Common. Edible but not worthwhile -avoid. Distribution, America and Europe.