148 A TEXT-BOOK OF BOTANY 
other grasses, distorting them and producing the excrescent 
growths from which the ergot 
is obtained (Fig. 136). 
Fig. 138.—A cup-fungus growing on a 
—After Lrnpav. spruce.—After REHM. 
Most attractive, however, is the group of sac Fungi 
with spore-fruits shaped 
like saucers, cups, funnels, 
flat disks, etc.; for the 
lining, made up of a layer 
of the spore - containing 
sacs, 1s often some brilliant 
shade of red, yellow, or 
brown (Figs. 137 and 138). 
The scarlet-lined cups of 
certain forms are often 
seen on decaying logs, 
stumps, ete.; and in the 
morels the spore-fruits get 
so large and fleshy that 
they are used as one of the 
most delicate of the edible 
mushrooms, although they 
Fic. 139.—The common edible morel, the are not mushrooms at all 
depressions in the surface being lined 7 
by a layer of asci.—After GIBSON. (Fig. 139). 
