82 HARPER: Two REMARKABLE DISCOMYCETES 
2. PUSTULARIA GIGANTEA Rehm 
In July, 1899, I found some large cup fungi on the ground 
among dead leaves on Mackinac Island, Michigan. Later I sent 
them to Dr. H. Rehm, who described them as a new species under 
the name Pustularia gigantea. The description was published in 
Annales Mycologici (3: 517. 1915). I have since found the plant 
several times in coniferous woods on Neebish Island. In Septem- 
ber, 1907, it was abundant in a piece of cedar and balsam woods, 
and I secured the photograph of the opened plant, PLATE 3, A, 
and preserved a number of unopened plants in alcohol, from 
which the photograph of the section, B, was made. The specimens 
sent to Dr. Rehm were dried and somewhat torn, so that they did 
not show the peculiar folding in of the edges of the apothecium and 
the way in which the mature plants burst open, which are two 
of the most striking characters of the species. 
The unopened apothecia are irregularly ellipsoid with a deep 
groove across the top. The apothecia often occur in clusters in 
which the orientation of the members is irregular. The surface of 
the apothecia is nearly smooth, whitish in color, and much soiled 
by the earth or mould in which the plants are buried. 
The apothecia have a definite interior structure which is shown 
in PLATE 3,B. This figure represents a vertical section cut from 
the center of an unopened apothecium. There is no stem and the 
flat under surface lies directly on the soil, with which it is connected 
by strands of white mycelium. Quite frequently the connection 
with the substratum is lost, as is the case with the Hypogaei. 
The cup is roughly and partially divided into two chambers by 
the infolding of the edges of the apothecium. The chambers can 
be recognized in all the plants examined, though they are at times 
more or less distorted. The infolded edges extend to the bottom 
of thecup. In a section like this made through the center of the 
apothecium the infolded walls are divided at the base. In sections 
near the ends of the apothecium they are united. The walls have 
been infolded till the usual apical opening or mouth of the cup in 
other Pezizaceae lies on the bottom of the cup. Neither the lips 
nor the walls are grown together, though they are pressed closely 
against each other. In the section before us the walls have sprung 
apart. The lips are like those of other cup fungi with the hypo- 
