50 NEW YORK STATE MUSEUM 



spores subglobose, cominonly broader than long, colored, smooth, 

 4-16 in a chain, 6-10 /t long, 8-18 a broad. 



On dead stems of Ambrosia t r i f i d a L. Louisville, 

 Kansas. September. E. Bartholomew. 



Caespites vulgo effusi, atri; catenae sporarum simplices persis- 

 tentes, rectae vel leviter curvatae, vulgo ad apicem attenuatae vel in 

 parte media latiores utrinque angustatae, 40-100 ij. longae ; sporae 

 subglobosae, leves, fuscae, 4-16 in quavis catena, 6-10 x 8-18 m. 



Hypoxylon bartholomaei 



Stroma effused, thin, about i mm thick, 2-3 cm long, .5-1 cm 

 broad, subelliptic, sometimes with a slight narrow sterile black 

 margin, even, black, opaque ; perithecia monostichous, subglobose, 

 .5 mm broad, the ostiola scarcely visible ; asci cylindric, 160-200 p- 

 long, 8—12 p. broad; spores monostichous, ellipsoid, at first pale 

 and i-2-nucleate, then colored, 16-24 ij. long, 8-12 /i broad; para- 

 physes filiform. 



On decorticated wood of red alder, Alnus rubra Bong. 

 Rolling Bay, Washington. August. E. Bartholomew. 



The distinguishing characters of this species are the thin subel- 

 liptic stroma and its dull even black surface. The ostiola are not 

 visible to the naked eye. The young conidial state not seen. 



Stroma effusum, tenue, circiter i mm thick, 2-3 cm longum, .5—1 

 cm latum, subellipticum, leve, atrum, opacum ; perithecia mono- 

 sticha, subglobosa, .5 mm lata, ostiola vix visibilia ; asci cylindracei, 

 160-200 X 8-12 fj. ; sporae monostichae, ellipsoideae, primo pallidae. 

 uninucleatae vel binucleatae, deinde coloratae, 16-24 x 8-12 m ; para- 

 physes filiformes. 



Lepiota allenae 



Pileus thin, conic, convex or campanulate, widely striate on the 

 margin, unpolished, whitish or tinged with pale yellow, often yellow- 

 ish brown in the center; lamellae thin, 1-2 mm broad, free, close, 

 whitish or tinged with pale yellow ; stem slightly tapering upward, 

 glabrous, hollow, colored like the pileus, the annulus slight, per- 

 sistent or evanescent ; spores broadly ellipsoid or subglobose, 5-7 ^ 

 long, 4-6 IJ. broad. 



Pileus 8-15 mm broad; stem 12-20 mm long, 1-2 mm thick. 



Cespitose. In a greenhouse. Newtonville, Massachusetts. Au- 

 gust. Miss L. C. Allen. 



