Ossicaulis lignatilis (Pers.) Redhead & Ginns syn. Pleurotus lignatilis (Pers.) P. Kumm. (illustrated 60% life size) Cap 1.5–5cm across, slightly depressed; creamy white. Stem 5–20×4–8mm, central or slightly excentric; whitish, discolouring ochraceous. Flesh white; smell strong, of meal. Gills crowded; white then ochraceous-cream. Spores 4.5×2.5¼, oval. Spore print white. Habitat on dead deciduous wood, especially inside the hollow trunks of beech and elm, where it produces a brown rot; autumn. Occasional. Unknown edibility. Note this fungus was included in Pleurotus in my first book.