Kauffman: The genus Cortinarius 325 



Cortinarius deceptivus sp. nov. 



{Telamo7iid) 



Pileus 1-7 cm. broad, suborbicular to hemispherical, becoming 

 convex-campanulate, fawn-colored, tinged with lavender, the lav- 

 ender tints fading very quickly to pure fawn or light tan, disk 

 alutaceous-buff (Ridg.), covered all over with minute brownish 

 squamules when young, becoming subglabrous, somewhat hy- 

 grophanous, rugulose in age. Flesh hygrophanous, pallid with a 

 strong lavoider tinge when yown^, which fades out quickly, becom- 

 ing the color of new cork, thick on disk, thin towards the mar- 

 gin ; texture spongy. Gills 3-5 mm. broad, thick, moderately 

 close, adnate, emarginate, attenuate at the margin of pileus, laven- 

 der zvhen youngs fading to pale tan w^hen old. Stem rather stout 

 when young, becoming slender, ^-6 cm. long, thickened below and 

 tapering upward, /. <?,, clavate, solid, covered when young by the 

 thick fibrillose universal veil which is lavender, fading to white, and 



remaining as oblique, fugacious, brownish scales or partial rings, 

 these terminate above in the remains of the partial veil which are 

 stained by the spores. Spores 7-9.5 /^ X 6-7// subspheroid to 

 broadly elliptical, rough. The colors and shapes of the plant are 

 very variable and deceptive. Odor not characteristic. (Figure 7.) 



Common in hemlock woods. Gregarious. On ground and 



among remains of very rotten logs and brush-heaps, in Coy's Glen, 



near Ithaca, N, Y., August and September, 1 902-1 904, C. H. 



Kauffman. 



University of Michigan. 



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