Collybia fuscopurpurea (Pers.) P. Kumm. syn. C. obscura J. Favre (illustrated 50% life size) Cap 2–4cm across, convex then flattened or depressed; dark purple-brownish. Stem 30–70×2–4mm; concolorous with cap, sometimes blackish towards base. Flesh pinkish brown; thin. Gills grey-brown to chocolate-brown. Spores 6.5–7.5×3–4¼, elliptic to teardrop-shaped, thin-walled. Spore print white. Cheilocystidia poorly differentiated, worm-like, sometimes lobed at the blunt tips, thin-walled, hyaline. Surface of cap formed of interwoven, coralloid, thin-walled, brown hyphae, encrusted with granular, dark brown pigment. Interhyphal dark brown pigment granules present in flesh. Habitat in small tufts amongst grass in beech woods; late autumn. Uncommon. Unknown edibility. Note this may move to a new genus Gymnopus.