ANATOMY OF FUNGI 



49 



distinguished from other cells of the hymenial layer at an 

 early period of development, when the sporophore is only 

 three mm. high. 



In the Protobasidiomycetes the basidia are septate, and 



FIG. 16. Typical basidia of Hemibasidiomycetes. i, basidium of 

 Pilacre Petersii ; compare with fig. of basidium of Tulostoma mammosum ; 

 2-4, basidia of Tremella lutescens, at different ages ; 5, basidium of 

 Exidia auricula-judae ; 6, germinating spore of Triphragmium nlmariae ; 

 the promycelium or first product of germination is limited in growth and 

 is divided into three or four cells : each cell bears a secondary spore. All 

 highly mag. 



hence composed of more than one cell. In the Auricu- 

 larieae the basidia are cylindrical and transversely septate, 

 each cell producing one sterigma. In the Tremellaceae 

 the subglobose basidium is divided inlo four cells by two 



D 



