Kauffman : The genus Cortinarius 303 



pileus with the stem. Gills persistent, dry, changing color during 

 the process of maturing, at length powdery with the clinging 

 spores. Trama of pileus and stem fibrillose. Spores, when mature, 

 for the most part cinnamon-brown in mass, subochraceus to rusty^- 

 brown by transmitted light. (A more detailed description of the 

 veil must be looked for below.) 



The genus w^as divided by Fries into six subgenera. There is 

 hardly a doubt that these will be erected, either w^holly or in part, 

 into full genera. Some writers have already done so, but until we 

 know more of the developmental history of the various forms in- 

 cluded in these subgenera, it seems to me a rash procedure to mul- 

 tiply genera. The following key, together with a diagnosis of the 

 subgenera, is herewith presented : 



ICey to Subs^enera 



A. Pileus, or both pileus and stem, viscid. 

 Neither pileus nor stem viscid. 



a 



B, Both pileus and stem viscid or glutinous from the universal veil. Myxachim. 

 Surface of pileus alone viscid or glutinous. Phleginacium. 



r 



C. Plant when young covered by a universal veil. Telamonia, 

 Plant without a universal veil. -^- 



D, Pileus hygrophanous, glabrous ; color fading on drying. Hydrocyhe. 

 Pileus dry, not hygrophanous. -^• 



E. Plants large to medium; stem stout, clavate. Lioloma, 

 Plants small to medium ; stem slender, equal, pileus subsilky. Dcrmocyhe, 



Myxacium, Pileus fleshy, rather thin. Entire young plant 

 covered by a universal veil which is glutinous and the shreds of 

 which cling to the stem, making it viscous also ; on drying, pileus 

 and stem become polished. 



Phlegmacium. Pileus fleshy throughout, with a thin gelatinous 

 cuticle which becomes viscid. Stem and cortina dry. No univ^er- 

 sal veil. Stout plants. 



Telamonia. Flesh of pileus thin, or somewhat thicker on 

 disk, scissile ; pileus hygrophanous, at length covered by white, 

 superficial fibrils, the remains of the universal veil. Entire plant 

 when young covered by the universal veil, which remains on the 

 stem either as partial rings or as a sheath. Partial veil soon 

 disappearing. 



HvDRocYBE. No universal veil. Pileus hygrophanous, chang- 

 ing color on drying. Flesh thin, scissile. The partial veil some- 

 times remaining as an evanescent annulus on the stem. 



Inoloma. Pileus fleshy, rather thick throughout, dry ; the 

 scales or fibrils on the surface are not due to a universal veil, but 



