HEMIBASIDIOMYCETES 341 



of the basidium, but consider the cross marking present at 

 the apex of the basidium as simply due to the first bulging 

 out of the stout bases of the four sterigmata. If this idea 

 proves to be correct, the Tremellaceae must return to 

 the Basidiomycetes proper and occupy a position next to 

 Dacryomycetaceae. Many of the species are large, com- 

 posed of brain-like convolutions, and sometimes brightly 

 coloured. In some species of Tremella large numbers of 

 conidia are produced in the substance of the sporophore, 

 below the hymenium. In Tremellodon the sporophore is 

 more or less tongue-shaped, growing horizontally, and 

 furnished on the under surface the hymenium with 

 crowded spines, as in the genus Hydnum. 



Brefeld has shown that the spores of many species, 

 on germination, produce secondary spores almost at 

 once. 



Saprophytes, growing on wood. 



Widely distributed. 



Hyalorieae 



The basidia are of the same type as in Tremellaceae, 

 but the present family differs in the stiptate, erect sporo- 

 phore which is thickened at the apex, and is parallel with 

 the Pilacreaceae in general build, but is gymnocarpous. 



One species known, from Brazil. 



Arthur, * Amphispores of the Grass and Sedge Rusts,' 

 Bull Tor. Bot. Club, 32, p. 35 (1905)- 



Brefeld, { Protobasidiomyceten,' Unters. Ges. Mykol., 7. 

 Heft (1888). 



Brefeld, * Brandpilze [Ustilagineae],' Unters. Ges. MykoL, 

 5. Heft (1883), ii. Heft (1895), 13- Heft (*9S)- 



