Diatrype disciformis (Hoffm.) Fr.

Order Pezizales
Family Tuberaceae - the truffles.
The inoperculate ascus has a
thick tip that is perforated by a
pore (there is a hole through the
tip). The pore wall may turn
blue in Melzer’s reagent.
Ascus (showing an apical perforation
pore with the wall turning blue in
iodine solution), paraphyses and
ascospores of Mollisia ventosa. ©
Hans-Otto Baral
http://tolweb.org/Leotiomycetes
The ascomata are closed, hypogeous and
solid (no air spaces any more -- as you can
see in this bisected specimen of Tuber
aestivum, which a truffle dog brought to me
at Scheggino in Italy)
The asci, produced in a highly convoluted
hymenium, are rounded and thin-walled
(those of Tuber albidum are shown at left)
with no trace of an operculum or other
shooting mechanism, and usually contain
only 1-3 spores. TEXT.