18 Annual Report of the State Botanist. 



Collybia expallens n. sp, 



Pileus thin, broadlj'' convex, then plane, centrally depressed, 

 g-labrous, h37^grophanous, watery-brownish and striatulate on the 

 thin margin when moist, whitish when dry, flesh whitish when dry, 

 odor farinaceous ; lamellae rather broad, subdistant, rounded behind, 

 adnexed, whitish subcinereous or dingy -yellowish ; stem short, hol- 

 low, equal or slightly thickened at the base, spores broadly ellipti- 

 cal, ".0002 in. long, .00016 broad. 



Pileus 1 to 2 in. broad ; stem about 1 in. long, 2 lines thick. 



Among fallen pine leaves in woods. Salamanca, Cattaraugas 

 county. September. 



The pileus is very much paler when dry than it is when moist. 

 When fresh the stem is adorned with delicate fibrils or flocci, but 

 these soon vanish or disappear with a touch. In drying, the moist- 

 ure disappears from the disk first, the margin last. The farinaceous 

 odor is very distinct. The attachment of the lamellae easily distin- 

 guishes this plant from similar species of Clitocybe. 



Mycena pseudopura Gke. 

 Woods. Salamanca. September. 



Omphalia corticola n. sp. 



(Plates, flgs. 8toi2.) 



Pileus thin, submembranous, convex, becoming expanded and 

 umbilicate, distantly striate, whitish or pale cinereous; lamellae 

 narrow, distant, at first arcuate and adnate, then decurrent, white ; 

 stem short, curved, sprinkled with mealy particles, at first whitish 

 with a brown base, then wholly brown or whitish at the top only ; 

 spores elliptical, .0003 in. long, .00016 broad, generally uninucleate. 



Pileus 2 to 4 lines broad ; stem 4 to 6 lines long. 



Bark of living oak trees, Quercus alba. Carrollton. September. 



This species closely resembles Mycena corticola, from which it is 

 separated by its paler pileus, narrower and at length decurrent 

 lamellae and elliptical spores. Its mode of growth is the same as in 

 that species. 



Pleurotus pubescens n. sp. 



Pileus fleshy, convex, suborbicular, pubescent, yellowish ; lamelhe 

 broad, subdistant, rounded behind, sinuate, pallid tinged with red ; 

 stem short, firm, curved, eccentric, colored like the pileus ; spores 

 globose .0003 in. broad. 



Pileus about 2 in. broad ; stem scarcely 1 in. long. 



Trunks of trees. Lyndonville. C. E. Fairman. 



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