KEY TO THE DIVISIONS AND GENERA 

 OF BRITISH BASIDIOMYCETAE 



BASIDIOMYCETAE. 



L ^ "I HOMOBASIDIAE. 



II. Basidia longitudinally divided, trans- } 



versely septate, or simple; spores pro-!- HETEBOBASIDIAE. 

 ducing sporidiola on germination J 



HOMOBASIDIAE. 



* EU-HOMOB ASIDIINE AE. 

 Saprophytes. 



L GASTEROMYCETALES. 



2. Hymenium at first covered by a volva, \ 

 or a ring, becoming fully exposed at 



maturity, usually inferior, and spread V AGARICALES. 

 over the surface of gills, fleshy pores, ! 

 or a smooth surface ) 



3. Hymenium exposed from the first, 'i 



APHYLLOPHORALES. 



or a smooth surface 



**EXOBASIDIINEAE. 



Parasites. 



4. Hymenium effused, rarely consisting) 



of basidia only. Parasitic on leaves, j- EXOBASLDIALES. 

 etc. (especially Ericaceae) ) 



HETEROBASIDIAE. 



CyHn l 



