86 NEW YORK STATE MUSEUM 



cate and slightly fibrillose on the margin, the umbo usually becoming 

 paler than the rest ; lamellae broad, subdistant, ventricose, subad- 

 nate, brownish red becoming purplish brown, finally almost black; 

 stem slender, flexuose, hollow, white, commonly hairy tomentose 

 at the base and slightly mealy at the top; spores blackish brown 

 or almost black, 12-16 ij- long, 6-8 /^- broad. 



Pileus 2-3 cm broad; stem 4-7 cm long, 1.5-2 mm thick. 



Gregarious or subcespitose. On chip dirt and vegetable mold. 

 Hamilton co. July. Rare. 



It is closely related to Psathyra corrugis (Pers.) Fr. 

 from which it may be separated by its much darker colored and 

 striatulate moist pileus, atomate and with a white umbo when dry, 

 less glabrous and more slender stem and broader spores. The 

 umbo is very prominent and loses its moisture before the rest of 

 the pileus. In consequence it becomes very conspicuous, appearing 

 like a white knob in the midst of a dark background. Because 

 of the fibrils on the margin of the pileus it is placed in this section 

 though the fibrils are not always present. In the dried specimens 

 the margin is sulcate striate. 



Psathyra vestita Pk. 



CLOTHED PSATHYRA 



N. Y. State Mus. Bui. 105, p.28 



Pileus submembranaceous, ovate, conic or subcampanulate, ob- 

 tuse, at first covered with white flocculent fibrils, reddish becoming 

 pallid or white and silky fibnllose, sometimes slightly striate on 

 the margin when moist, striate to the center when dry; lamellae 

 thin, narrow, close, adnate, white when 3^oung, becoming blackish 

 brown; stem equal, hollow, flexuous, floccose fibrillose becoming 

 silky fibrillose, mealy and often striate at the top, white; spores 

 purplish brown, 8-10 !j. long, 5-6 !j- broad. 



Pileus 8-16 mm broad; stem 2.5-4 cm long, 2-3 mm thick. 



Gregarious. Among fallen leaves and grass. Essex co. Sep- 

 tember. 



This species is closely related to Psathyra semivestita 

 B. & Br. from which it difi'ers in color and in being wholly clothed 

 when young with white floccose fibrils. 



