278 
STRUCTURE AND LIFE HISTORIES 
composed of innumerable hyphse (Fig. 201), closely asso- 
ciated together in a pseudo-tissue, but there is no real 
FIG. 201. Cortinarius cinnamomeus. Above, longitudinal section 
through stipe and pileus, showing gills (g); below, longitudinal section 
through primary and secondary gills; h, hymenium or sporogenous surf ace. 
(After Gertrude E. Douglas.) 
tissue-differentiation, such as occurs in the mosses and 
ferns and higher plants, though the external layer may 
usually be peeled off with ease. 
270. Reproduction. If the pileus of Agaricus is placed 
