FUNGI 25 



'J a. Peridium leathery) corky or woody, OapiUiHum 



it i/. 



Scleroderma. Peridium often strongly sculptured. 

 '2b. Peridium rather fragile. OapiUiHum copious, 



Bovista. Sporooarp not at all stalked, smooth; mycelium 

 not persistent at the base ; capillitium with well-marked main 



stems giving rise to dichotomous branches attenuated at the 



ends. 



Ly coper don. Sporooarp more or less strongly stalked, often 

 ornamented with granules, -warts, spines, or the like ; mycelium 

 Stent as a mass of loose fibres at the base; capillitium 

 without special main trunks. 



HYMENOMYCETES. Genera : 



1 a. Hymenium spread over the surface of definitely shaped 

 cavities or outgrowths from the underside of the 

 mostly pileate sporooa p. 

 2 a. Hyrnenium on rad lately disposed, gill-like lamellce. 

 3 a. Sporooarp fleshy, soon decaying. 

 4 a. Lamella: thin, leaf-like, edge acute. 

 5 a. Neither p ileus nor lamellce deliquescent. 

 6 a. Sporoca?-p without any milky juice. 

 7 a. Veil xrhen present not arachnoid. 

 8 a. Lamellce not hygrophorous. 



Agaricus. Trama filamentous ; lamella} membranaceous, 

 fragile. 



Russula. Trama vesiculose ; lamellae fragile, not filled with 

 sap. 



8 b. Lamellce hygrophorous. 



Hygrophorus. Lamellae rather waxy. 



7 b. Veil arachnoid. 

 Cortinarius. Trama floccose. 



6 b. Sporocarp> or at least the lamellce with a milky 



juice. 



Lactarius. Often acrid. 



5 b. JBothpileus and lamellce deliquescent. 



