Trichoderma alutaceum
Trichoderma alutaceum
Trichoderma alutaceum
Trichoderma alutaceum
Trichoderma alutaceum
Found in July growing from the roots of a fallen American beech tree.
Trichoderma alutaceum asci with ascospores
Trichoderma alutaceum ostiole
Trichoderma alutaceum ostiole
Asci with spores.
(Perithecia completely broken away
during slide preparation.)
Cross-section of stroma showing
perithecia.  Asci, the spore producing cells,
develop within these walled chambers.
Top views of stroma showing small pores (ostiole) where spores
are released from the perithecia.
Trichoderma alutaceum stroma
Trichoderma alutaceum perithecia
Trichoderma alutaceum
Trichoderma alutaceum
Podostroma alutaceum is a synonym. This mushroom belongs to a class of
fungi known as Ascomycetes, the sac fungi; and to a particular group called
flask fungi (pyrenomycetes), which includes
Xylaria and Cordyceps species.  
These fungi develop tiny fruiting bodies (perithecia) that are embedded in
what George Barron calls "a massive fungus matrix", the stroma.