12 Reproduction in the Mushroom Tribe. By W. G. Smith. 



subject in hand will now centre. But let it be borne in mind as a 

 preliminary fact of the utmost importance that at first the fungus is 

 composed wholly of simple cells which show no differentiation ; 



Fig. 3. — Coprinus radiatus, Ft. 



Vertical section and surface of Gill, enlarged 150 diam. 



W, Cystidia. 



W.C.S. *D. M«T- 30» 



V, Basidia with spores ; 



no differentiation in the cells is seen in infancy when the gills are 

 first formed, but the privileged cells, known as basidia and cystidia, 

 come only into existence and that simultaneously as the plants 

 reach maturity. This differentiation I consider to be sexual, the 



