(singular: Pseudothecium): The fruiting bodies of Phaeocryptopus gauemannii. Fruiting bodies mature in needle stomates, and physically block needle absorption of carbon dioxide, resulting in carbon starvation. Sexual fungal spores of P. gauemannii, called ascospores, are contained in sacs (asci) within pseudothecia, and spores are discharged from these sacs in spring and early-summer when the fruiting bodies are mature, environmental conditions are favorable and new Douglas-fir foliage is expanding.