Podostroma alutaceum
This fungus was found in July growing from
the roots of a fallen American beech tree.
INDIANA MUSHROOMS


Podostroma alutaceum 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.  
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.
Spores emerging
from asci.