674 NEW YORK STATE MUSEUM 



Cortinarius corrugatus Pk. 



Corrugated Cortinarius 



Plate SI fis- 6-13 



Pileus fleshy, broadly campanulate or very convex, viscid when moist, 

 coarsely corrugated, bright yellow, reddish yellow, tawny or ochraceous, 

 flesh while; lamellae close, pallid when young, becoming tawny with 

 age ; stem rather long, equal, hollow, bulbous, pallid or yellowish, the 

 bulb viscid and usually colored like the pileus; spores broadly ellip- 

 tic, rough, .00045 to .03055 in. long, .0003 to .0004 broad. 



The corrugated Coninarius is a well marked and easily recognized 

 species, quite distinct from its ahies. Although the color of the pileus is 

 variable, its viscid, corrugated surface and the viscid bulb of the stem 

 afford distinctive and easily recognized characters. Sometimes the cor- 

 rugations or wrinkles anastomose with each other in such a way as to 

 give a reticulated appearance. The color varies from yellow to reddish 

 tawny or reddish ochraceous. The margin in young plants is incurved. 



There is a variety in which the cap is adorned with darker colored 

 spots or scales. This bears the name, variety subsquamosus. In all 

 other respects it is like the species. 



The gills are closely placed side by side. They are at first of a pale 

 hue but assume a darker and more definite tawny color with age. They 

 are usually minutely uneven or eroded on the edge and transversely 

 striate on the sides. They are slightly narrowed toward the stem. 



The stem is generally a little longer than the width of the cap. It is 

 commonly smooth but sometimes sprinkled near the top with minute 

 yellowish particles and adorned below with a few fibrils. It is hollow 

 and has a distinct viscid bulbous base, the viscidity of which is a pecu- 

 liar feature. This bulb in the very young plant is even broader than the 

 young cap that at this stage of development appears to rest upon it. The 

 color of the bulb is usually like that of the cap, but the stem is com- 

 monly paler than either. 



The cap is 2 to 4 in. broad; the stem 3 to 5 in. long, 3 to 8 lines thick. 

 The plants are gregarious in woods and bushy places and may be found 

 from June to September. It sometimes grows in considerable abundance 

 and as an edible species it is not to be despised. 



