Calocybe constricta (Fr.) Kuhner ex Singer syn. Lyophyllum leucocephalum (Bull) Singer syn. Tricholoma leucocephalum (Bull.) Sacc in Quél. (illustrated 45% life size) Cap 3–6cm across, convex, sometimes with an obtuse umbo; silky white, occasionally tinged yellow at the centre; smooth. Stem 40–60×5–10mm, rooting at the tapering, twisted base; white; smooth. Flesh white; smell mealy. Gills crowded; white. Spores 7–10×4–6¼, ovoid, distinctly warted. Spore print white. Habitat in broad-leaved woods; late summer to autumn, although this collection was made on the 8th of July. Uncommon. Unknown edibility.