BOLETUS PARASITICUS 



435 



The parasitic Hymenomycetes vegetate in the fleshy fruit-bodies 

 of the fungi which they attack and, when they fructify, there is 

 presented to the eye the curious and unusual spectacle of the fruit- 

 body of one agaric growing upon that of another agaric. The 

 following is a list of the hymenomycetous agarics which are parasitic 

 on other agarics : 



Hymenomycetous Agarics Parasitic on Other Agarics. 



[Scleroderma vulgare 



Boletus parasiticus on 



Leptonia parasitica on 

 Claudopus subdepluens on. 



Volvaria Loveiana 



on 



Nyctalis asterophora on i 



Nyctalis parasitica on 



Stropharia epimyces on 



(S. verrucosum 



Cantharellus cibarius 



Polyporus perennis 

 jClitocybe nebularis 

 |C. clavipes 

 'Russula adusta 



R. nigricans 



Lactarius piperatus 



L. vellereus 

 ^Collybia fusipes 



Russula adusta 



R. nigricans 



R. foetens 



R. chloroides 



R. delica 



Lactarius vellereu** 



L. blennius 

 jCoprinus comatus 

 (C. atramentarius 



Boletus parasiticus. — Boletus parasiticus (Fig. 182) attacks the 

 fleshy fruit-bodies of Scleroderma vulgare {— S. aurantium) and 8. ver- 

 rucosum in England (where I have met with it), France, and other 

 parts of Europe ; and it has also been found upon S. vulgare in 

 North America. 1 The pileus is 2-8 cm. in diameter, dingy yellow, 

 tawny, or more or less brown, dry, and minutely tomentose ; while 

 the pileus-flesh, hymenial tubes, and stipe are all more or less 



^ C. Mcllvaine, One Thousand American Fvngi, Indianapolis, 1900, p. 427. 



