Nectria peziza

Nectria peziza (Tode) Fr. (illustrated twice life size) Fruit body 0.2–0.4mm across, globose when fresh, collapsing into a cup-like shape when dry (not shown); bright yellow. Spores 12–15×5–7¼. Asci 75–90×8–10¼. Habitat on rotting polypores and rotten wood, shown here on old Polyporus squamosus; all year. Occasional. Not edible.