140 A TEXT-BOOK OF BOTANY 
by keeping a piece of moist 
bread in a warm room un- 
der a glass vessel. The 
sources of its food supply 
indicate that it is a sapro- 
phyte. 
The body of Mucor is 
a good illustration of the 
bodies of ordinary Fungi. 
The principal part of the 
body consists of colorless 
Fic. 127,—Developing sporangia of Mucor. branching threads, either 
A, swollen tip of sporophore; B, wall jgolated or more often in- 
separating sporangium from the rest of 
the body. terwoven, and is called the 
mycelium (Fig. 125). The 
interweaving may be very 
loose, the mycelium look- 
ing like a delicate cobweb; 
or it may be close and 
Fig. 128.—Mature sporangium of Vucor, Fic. 129.—Burst sporangium of Mucor, 
showing wall (a), numerous spores the ruptured wall not being shown, 
(c), and partition wall pushed up into the loose spores adhering to the con- 
the cavity of the sporangium (0). vex partition wall (see Fig. 128). 
