Murrill: Agaricaceae of Tropical North America 193 



A rather common species in the southern United States, ranging 

 north to New York and west to Kansas. At Kew, it is. repre- 

 sented by specimens from South Carolina and. Ohio only, those 

 from Cuba bearing this name being an entirely different plant. 

 Fries knew the species well, so we may infer that Liebmann's 

 specimens from Orizaba, Mexico, were correctly determined, 

 although they appear to have been lost. This species has the habit 

 and general form, but neither the brilliant coloring nor the poi- 

 sonous properties, of M. Mud ens. It is difficult to distinguish 

 from certain forms of Armillaria meilea, which also occurs in 

 dense clusters about old stumps but is usually furnished with a 

 veil. The spores of M. caespitosus are broadly ovoid, smooth, 

 hyaline, 7 X 5 /*• 



Orizaba, Mexico, Liebmann; British Honduras, Morton E. 

 Peck. 



4. Melanoleuca Pat. Tax. Hymen. 159. 1900 



Tricholoma (Fries) Quel. 1872. Not Tricholoma Benth. 1820. 



This genus, usually known as Tricholoma, is abundantly repre- 

 sented in temperate regions. It differs from Clitocybe chiefly in. 

 its sinuate or adnexed, instead of decurrent, gills. 



1. Melanoleuca holoporphyra (Berk. & Curt.) 



Agaricus (Clitocybe) holoporphyrus Berk. & Curt. Jour. Linn. 

 Soc. 10: 284. 1868. 



Described from Wright's Cuban collections, and said to grow on 

 rotten logs in woods. The types at Kew have been examined. 

 My own notes, supplemented by a colored drawing, are as follows : 

 " Pileus convex, 6 cm. broad ; surface latericious, dry, finely 

 tomentose, slightly striate on the margin ; lamellae sinuate with a 

 decurrent tooth, broad, distant, testaceous ; spores ovoid, smooth, 

 hyaline, 9-12 X 4~7m; stipe equal, pale-purple, glabrous, hollow, 

 with a fibrous-looking rind, 6X1 cm. Solitary in rich soil in 

 coffee plantations along the Rio Blanco, January 17, 1910." 



Xuchiles, Mexico, IV. A. & Edna L. Murrill 1125, 



2. Melanoleuca dichropus (Fries) 



Agaricus (Tricholoma) dichropus Fries, Nova Acta Soc. Sci. 

 Upsal. III. 1 : 22. 1851. 



