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TEXT-BOOK OF FUNGI 



mycetes, whereas the Pilacreae were by some placed in the 

 Hyphomycetes, and by others in the Gastromycetes. 



Brefeld first suggested the name Hemibasidii for the 

 Ustilagineae and the Tilletiae, which he considered as 



FIG. 84. Typical basidia of Hemibasidiomycetes. i, basidium 

 of Pilacre Petersii \ compare with fig. of basidium of Tulostoma 

 mammosnm. 2-4, basidia of Tremella lutescens, at different ages. 

 5, basidium of Exidia auricula- judae. 6, germinating spore of 

 Triphragmium ulmariae : 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. 



representing the connecting-link between the Phycomycetes 

 and the Basidiomycetes. Those Basidiomycetes (Hemi- 

 basidiomycetes) with septate basidia he supposed to have 

 descended from the Ustilagineae, whereas the Basidio- 

 mycetes with a continuous (not septate) basidium (Auto- 



