DARK-SPORED AGARICS— II 



GOMPHIDIUS AND STROPHARIA 



William A. Murrill 



The first article of this series, published in Mycologia for 

 March, 1922, dealt with the species of Drosophila, Hypholoma, 

 and Pilosace occurring in the temperate regions of eastern North 

 America. I shall take up now two genera having an annulus, in 

 addition to a fleshy stipe ; and these may easily be distinguished by 

 the following key : 



Lamellae decurrent, waxy ; veil glutinous ; spores black. Gomphidius 

 Lamellae adnate or adnexed ; veil membranous ; spores 



purplish-brown. Stropharia 



Gomphidius Fries, Gen. Hymen. 8. 1836 



This genus is distinguished by its glutinous veil ; decurrent, waxy 

 lamellae ; and black, elongate spores. There are very few species 

 and these occur mostly in temperate regions. The single tropical 

 species, G. jamaicensis, is known only from Cinchona, Jamaica, at 

 an altitude of 1,500 meters. G. vinicolor occurs in California; 

 G. oregonensis is abundant on the Pacific coast ; and G. tomentosus 

 is rare; the last two species being known only from the coastal 

 region. 



Pileus reddish-brown, not blackening ; context yellow : stipe 



yellowish-brown. I. G. viscidus 



Pileus purplish-brown or yellowish-brown, often black- 

 spotted, but not blackening entirely ; context white ; 

 stipe whitish. 2. G. glutinosus 



Pileus pale-brownish-red, becoming entirely black on dry- 

 ing ; stipe white, becoming black. 3- G. nigricans 



Pileus dark-red, becoming blackish on drying ; stipe vinous- 

 red. 4. G vinicolor 



Pileus dull-brownish-pink, becoming black-spotted ; stipe 



yellowish-brown. 5- G maculatus 



Pileus dingy-pink ; stipe pale-yellow. 6. G. flavipes 



Pileus whitish, sometimes tinged with red, becoming black- 

 ish at times ; stipe whitish. 7- G. furcatus 



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