THE AGARICACEAE OF TROPICAL NORTH 

 AMERICA— VII 



William A. Murrill 



The last article of this series, concluding a partial treatment of 

 the rusty-spored species, appeared in Mycologia for January, 

 191 3. Since that time, the entire group of Pholiotanae has been 

 taken up in North American Flora, volume 10, part 3, for the 

 temperate as well as the tropical regions of North America, and 

 the various rusty-spored genera have been treated in their proper 

 order as far as Inocybe, which genus will, with Pholiota, Cor- 

 tinarius, and Loccllina, be considered in forthcoming parts of 

 that work. 



The next and last subtribe of the Agariceae is now to be con- 

 sidered, at least so far as our tropical species are concerned. The 

 following key includes all the genera in this subtribe, some of 

 which are not represented in tropical America, but another 

 article will be required to complete the treatment of the species. 



Hymenophore circular, with central stipe. 

 Volva absent. 



Lamellae not deliquescent. 



Stipe slender, tubular, with a cartilaginous 

 cortex ; annulus absent except rarely 

 in Campanularius. 



Subtribe 4. AGARICANAE 



Hymenophore dimidiate, sessile or with short, lateral 

 stipe. 



Mel'anotus. 



Lamellae decurrent. 

 Lamellae adnate or adnexed. 



2, 



Deconica. 



Margin of pileus at first straight 

 ■ and appressed to the stipe. 

 Spores purplish-brown or 



dark-fuscous. 



3 



Atylospora. 

 psathyrella. 



Spores black. 



4 



Margin of pileus at first incurved. 

 Spores purplish-brown or 



dark-fuscous. 



5 



PSILOCYBE. 



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