74 Ni:\V YORK STATE MUSEUM 



llebeloma. Species with a luxuriant development of the veil must 

 be carefully distinguished from Stro])haria on one hand, and those 

 with a scanty development of it, from J'silocyhe on the other. 

 The species are not in all cases sharply limited and connecting 

 forms are not always satisfactorily located. They have been dis- 

 tributed in five sections, one of which, the \ iscida, is yet unrepre- 

 sented in our flora. The following synoptical key gives the dis- 

 tinguishing characters of the sections. 



KKY TO THK SECTIONS 



Pilous hygrophanous Appcndiculata 



Pilous not hygrophanous i 



I Pilous glabrous red or yollovv its prevailing colors Fascicularia 



1 Pilous not wholly glabrous and with other prevailing colors 2 



2 Pilous silky or floccose when young Floccosa 



2 Pileus hairy or fibrillose, brown or brownish Velutina 



Appendiculata 



Pileus hygrophanous. glabrous when mature. 



The species are commonly small, the pileus rarely exceeding two 

 inches in diameter. They in-habit decaying wood or ground rich in 

 humus and are gregarious or cespitose. The color of the pileus 

 in some species is greatly changefl Ijv the esca])e of its moisture, 

 in others but slightl}-. This may be regarded as a difficult section 

 because of the variability of the species and their close resemblance 

 to each other. 



KEY TO THE SPECIES 



Pilous at first whitish or yellowish incortum 



Pileus at first some other color t 



I Young lamtllae violaceous candnlloanuni 



I Young lamellae not violaceous 2 



2 Moisture of fresh pileus escaping first from the margin .. .madoodiscum 



2 Moisture of fresh pileus escaping first from the center ,] 



3 Plants gregarious, terrestrial hyiuenocephalum 



3 Plants commonly cespitose and lignatile appondiculatum 



Hypholoma incertum Pk. 



UXt'EKTAlX Il\ TIIOI.OMA 



N. Y. State Alus. Rop't 2Q, p.-|0. Mns. .Mom. 4, p. 1^5, ])l.f;o, lig.i-g 



Pileus thin, fragile, ovate or subcampanulate becoming yellow, 



especially in the center, comnionl\- white when dry, even or radiately 



wrinkled, the thin margin sometimes \\a\'\ or irregular and when 



young adorned with fragments ui the white fugacious veil, flesh 



