48 NEW YORK STATE MUSEUM 



distant, the other having them narrow and crowded. These groups ap- 

 pear to run together so that it is difficult in some cases to draw the line 

 between them. They have therefore been neglected to some extent in 

 the arrangement of our species. Neither has the tribal arrangement been 

 rigidly followed. C. co}iflue7is among the Vestipedes and C. acervata 

 among the Laevipedes appear to be out of place. In both, the pileus is 

 hygrophanous, and the lamellae are neither clear white nor bright colored 

 according to the requirements of the first section. In these respects they 

 belong rather to the second section, to which they are here referred. But 

 because of their caespitose character, I have instituted a new tribe for the 

 reception of these and other similar species. It differs from Tephrophanse 

 in the tufted mode of growth and may be characterized as follows : 



Confertipedes. Plants commonly caespitose, often growing in tufts of 

 many individuals, the stems crowded or even united at the base. Pileus 

 hygrophanous. 



It will be seen that the pileus, stem and mode of growth furnish all the 

 characters necessary for distinguishing the tribes. 



Key to the Tribes. 



Pileus hygrophanous 3 



Pileus not truly hygrophanous, dry, viscid or merely moist 1 



I Stem glabrous or fibrillose-striate 2 



I Stem velvety hairy floccose or pruinose Vestipedes. 



2 Stem commonly stout, grooved striate or fibrillose-striate Striaspedes. 



2 Stem thin, not conspicuously striate L^e^'ipedes. 



3 Plants ci-espitose Confertipedes. 



3 Plants scattered or gregarious Tephrophanse. 



StrisEpedes. 



Stem commonly stout, grooved, striate or fibrillose-striate, pileus dry, 

 viscid or merely moist. 



This tribe contains some of the largest members of the genus. The 

 stem in some is so thick and fleshy that the species may easily be sup- 

 posesj to belong to the genus Tricholoma. 



Lamellse broad, distant or subdistant I 



Lamellae narrow, close 2 



1 Pileus viscid when moist, glabrous radicata. 



I Pileus not viscid, fibrillose _. platyphylla. 



2 Stem brown "- fuliginella, 



2 Stem reddish or reddish-brown butyracea. 



2 Stem white or yellowish 3 



3 Lamellje white, often becoming spotted with red maculata. 



3 Lamellfe pale-yellow scorzonerea. 



