318 Kauffman : The genus Cortinarius 



colored drawings have been made of all the species presented in 

 the key. These, with the dried specimens, have been compared 

 with the type specimens of Professor Peck at Albany, or with 

 European exsiccati in the Cryptogamic Herbarium of Harvard 

 University. The writer here wishes to acknowledge the kindness 

 and courtesy shown him by both Professor Farlow and Professor 



Peck. 



The species included in this key are only such as were found 

 in the vicinity of Ithaca, N, Y., and which could, with a high degree 

 of certainty, be identified. Almost as many more, not included 

 in the key, need further study. It is hoped that the list may not 

 be less useful to students in other localities, even if it is local. Most 

 of the European species included have been reported for New 

 York by Professor Peck. 



The natural relationships of the species have been more or less 

 violated in the key, since its maker has had in mind not a final 

 grouping, but a help for beginners. 



A partial key to the Cortinarii in the vicinity of 



Ithaca, N, Y. 



A. Pileus with a gelatinous cuticle, more or less viscid or glutinous when moist, as is 



also the stem in some species, [Myxacium and Phlegm a ciumJ\ 

 Pileus coarsely corrugate. C. corrugattts Pk. 



Pileus not coirugate. 



Taste of the surface of the pileus extraordinarily bitter ; plants small. 



Taste not very bitter. 



Spores large, lo to i6 ^ long. 



C. vibi-atilis Fr. 

 C. amartis Pk. 



Stem cylindrical and long; entire plant very viscid. 

 Stem with evanescent scales, or none. 



C cylindripes sp. hov. 

 Stem with broken, concentric rings of floccose scales. 



C coUinitus (Pers.) Fr. 

 Stem bulbous or short. 



■ Spores IO-I2 /flong. 



Color very pale yellow with olivaceous tinge. 



C oHvaceiiS'Stramineus sp. nov. 

 Color yellow to orange-ochraceous ; no olivaceous tinge 



C nmliiforinis Fr. 

 Spores 13-16 It long; stem violaceous to blue, 



C, Alklnsonianus sp. nov. 

 Spores smaller, 6-9 /^ long. 



