Mycological Flora of the Rockies 129 



CoRTiNARius ATKiNsoNiANus Kaiiff. (Bulbopo(lium). In- 

 frequent. Leal. Under conifers. 



CoRTiNARius BALTEATUS Fr. (Plilegmacium) form pallidus. 

 Rare. Leal. 



These specimens lacked the violaceous-purplish tinge on the 

 margin of the pileus; but Fries noted forms of this kind in 

 Sweden. The broad, obtuse pileus is out of proportion to the 

 short stem. The gills are very broad and distinguish this spe- 

 cies from its relatives. Ricken says the stem is peronate, but 

 on what authority, I am unable to determine; at all events, 

 he does not depend on Fries. 



Cortinarius bistreoides sp. nov. (Telamonia). 



Pileus 2-4 cm. broad, submembranaceous, fragile, at first 

 conic-campanulate, then expanded-plane or repand on margin, 

 usually with a subacute umbo, glabrous, silky-shining when dry, 

 even, ''mummy brown" (Ridg.) when moist, "ochraceous-buff" 

 on drying, iwiho at length "bistr-e,^' and finally bistre elsewhere, 

 with a very thin margin, which is at first delicately white-silky, 

 at length incised or crenate-plicate ; flesh concolor, hygrophan- 

 ous, quite thin. Gills adnate, often sinuate, strongly ventricose, 

 broad, definitely subdistant, at first pallid-brownish, then 

 "tawny," edge white-flocculose. Stem slender, 4-6 cm. long, 

 2-4 mm. thick, equal, somewhat rigid-elastic, straight or flexu- 

 ous, solid, innately silky-fibrillose and shining when dry, slowly 

 fuscescent, incarnate-tinged within, scarcely marked by zones 

 of the evanescent, whitish universal veil. Odor slight, radishy- 

 earthy, taste shght or none. Spores elliptical, 10-12 x 5-6 (7) 

 fjL, tuberculate at maturity, dark rusty brown in microscope. 



Gregarious or subcaespitose, in moist places under spruce and 

 fir. Leal, Colorado. August. 



Distinguished from- its allies by its large spores, and the pre- 

 vailing bistre shades of the pileus. The flesh of the stem is. 

 solid and tinged by a shade of incarnate-brown, then slowly 

 fuscescent. The cap becomes blackish-streaked or stained in 

 age. The scanty cortina is white. C. badius Pk., which has 

 large spores, is entirely diflferent in the smaller size of the 

 plant and in its colors, etc. It must not be confused with C. 



