FUNGUS-FLOEA. 



ANALYSIS OF TEE SPECIES. 



Subgen. I. PIPERITES. 



Stem central. Gills unchangeable, not pruinose nor be- 

 coming discoloured. Milk white at first (usually) acrid. 



* Tricholomoidei. Pileus moist, viscid, margin incurved 

 and downy at first. 



** Limacini. Pileus moist, viscid, with a pellicle ; margin 

 naked. 



*** Piperati. Pileus without a pellicle, hence absolutely 

 dry, often more or loss downy or unpolished. 



Subgen. II. D APEXES. 



Stem central. Gills naked ; milk coloured from the first. 

 Subgen. III. KUSSULARIA. 



Stem central. Gills pallid, then discoloured, at length 

 dark, becoming powdered with the white spores. Milk white 

 at first, mild, or mild at first then becoming acrid. 



* Viscidi. Pileus viscid at first. 



** Impoliti. Pileus squamulose, downy, or pruinose. 

 *** Glabrati. Pileus polished, glabrous. 

 Subgen. IV. PLEUROPUS.J 

 Stem excentric or lateral. Growing on trunks. 



FIGURES ILLUSTRATING THE LEUCOSPORAK 

 Fig. 1, Russula ochroleuca, section through the thickness of a gill, 

 showing the vesicular trama consisting of large spherical cells ; also the 

 laticiferous vessels containing a densely granular substance, and project- 

 ing beyond the surface of the basidia forming the hymenium ; x 400 ; 

 Fig. 2, Bussula lutea, & small specimen ; nat. size ; Fig. 3, section of 

 same; nat. size ; Fig. 4, Amanita mappa; about half nat. size; Fig. 5, 

 section of same ; half nat. size ; Fig. 6, Lepiota crestata ; nat. size ; Fig. 7, 

 section of same ; nat. size ; Fig. 8, Armillaria ramentacea ; half nat. size ; 

 Fig. 9, section of same ; half nat. size ; Fig. 10, Tricholoma rutilans, 

 half nat. size ; Fig. 11, section of same ; half nat. size ; Fig. 12, spores 

 of same; X 400; Fig. 13, Mycena leucogala; half nat. size; Fig. 14, 

 section of same ; half nat. size ; Fig. 15, Cottybia butyracea, about one- 

 third nat. size; Fig. 16, section of same; half nat. size; Fig. 17, 

 Collybia ramealis ; nat. size. 



