Psathyrella marcescibilis (Britzelm.) Singer (illustrated 30% life size) Cap 1.5–4(8)cm across, conical to bell-shaped, margin appendiculate with whitish remnants of veil; grey-brown when moist, drying whitish-clay. Stem 30–100×2–5mm; white; fragile, hollow. Flesh white; thin; taste and smell not distinctive. Gills almost free; grey, becoming tinged purplish then blackish. Spores 12–16×6–7¼, elliptical, with germ pore. Spore print dark brown. Pleurocystidia lacking; cheilocystidia with swollen base and short, broad, obtuse neck, thin-walled. Habitat in deciduous woodland, especially on chalk; spring to autumn. Uncommon. Unknown edibility.