74 NEW YORK STATE MUSEUM 



Hebeloma. Species with a luxuriant development of the veil must 

 be carefully distinguished from Stropharia on one hand, and those 

 with a scanty development of it, from Psilocybe 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 Viscida, is yet unrepre- 

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

 tinguishing characters of the sections. 



KEY TO THE SECTIONS 



Pileiis hygrophanous Appendiculata 



Pileus not hygrophanous i 



I Pileus ghibrous red or yellow its prevailing colors Fascicularia 



I Pileus not wholly glabrous and with other prevailing colors 2 



2 Pileus silky or floccose when young Floccosa 



2 Pileus hairy or fibrillose, brown or brownish Velutina 



Appendiculata 



Pileus hygrophanous, glabrous when mature. 



The species are conimonly small, the pileus rarely exceeding two 

 inclies in diameter. They inhabit decaying wood or ground rich in 

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

 in some species is greatly changed by the escape of its moisture, 

 in others but slightly. 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 



Pileus at first whitish or yellowish incertum 



Pileus at first some other color i 



I Young lamellae violaceous candolleanum 



I Young lamellae not violaceous 2 



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



2 Moisture of fresh pileus escaping first from the center 3 



3 Plants gregarious, terrestrial hymenocephalum 



3 Plants conimonly cespitose and lignatile appendiculatum 



Hypholoma incertum Pk. 



UNCERTAIN TIYPHOLOMA 



N. Y. State INlus. Rep't 29, p. 40. Mus. Mem. 4, p. 165. pi. 60, fig. 1-9 



Pileus thin, fragile, ovate or subcampanulate becoming yellow, 



especially in the center, commonly white when dry, even or radiately 



wrinkled, the thin margin sometimes wavy or irregular and when 



young adorned with fragments of the white fugacious veil, flesh 



