Apothecial ontogeny inPulvinula tetraspora, an operculate Discomycete (Pezizales, Pyronemataceae), was followed by correlative light microscopy and scanning electron microscopy. Hymenial development was paragymnohymenial; opening occurred in the prohymenial phase. A functional ascogonium gave rise to ascogenous hyphae which by sympodial and centrifugal growth, produced typical croziers. Developmental aspects of the sterile and fertile portions of the apothecia were described and illustrated.