State Museum of Natural History. 87 



Clitocybe and Colly bia. From these they are distinguished by the 

 presence of an annulus. They are also separated from Pholiota and 

 Stropharia by their white spores. 



Our species are few, and with one exception very rare. Three have 

 been found in New York; eight in the United States. Most of the 

 species grow on the ground; some on both wood and ground. 



The name Armillaria is dei'ived from the Latin armilla, a bracelet, 

 and has reference to the annulus or ring that encircles the stem. 



Synopsis of the Species. 



Pileus wholly white, glabrous A. ponderosa. 



Pileus not wholly white or not glabrous 1 



1 Pileus adorned with dark spots, margin even A. nardosmia. 



1 Pileus adorned with hairy squamules, margin striate. ... A. mellea. 



Armillaria ponderosa, Pk. 



HEA%Tr Armillaria. 

 Report 26, p. 50. Agarieus magnivelaris. Rep. 29, p. 66. 



Pileus thick, compact, convex or subcampanulate, smooth, white or 

 yellowish, flesh white, the naked margin strongly involute, the 

 slightly viscid veil persistent; lamella?; crowded, narrow, slightly 

 emarginate, white inclining to cream color; stem stout, subequal, 

 firm, solid, coated by the veil, colored like the pileus, white and fur- 

 furaceous above the annulus; spores nearly globose, .00016 in. in 

 diameter. 



Pileus 4 to 6 in. broad; stem 3 to 5 in. long, about 1 in. thick. 

 Ground in woods. Columbia county. October. 



The veil conceals the young lamellaa for a long time, and finally 

 becomes lacerated and adheres in shreds or fragments to the stem 

 and the margin of the pileus. This species has not been found since 

 its discovery in 1872. In the Twenty-ninth report its name was 

 changed to Agarieus magnivelaris, that it might not conflict with 

 Agarieus ponderosus of Persoon; but as that is manifestly a species of 

 Tricholoma, the giving of generic value to the subgenera of Fries 

 permits the restoration of the original name to this species. 



Armillaria nardosmia, Ellis. 



Nard-siielling Armillaria. 



Torr. Bull. Vol. VI, p. 75. Agarieus rhagadiosus . Report 33, p. 18. 



Piieus fleshy, firm, thick and compact on the disk, th-in toward the 



margin, whitish variegated with bruvvu spot«, with a thick, tough and 



separable cuticle, flesh white; lamellae crowded, subventricose. 



