115 



branaceous, papillate. Asci 8-spored. Spoiidia, when mature, pluri- 

 septate-muriform, hyaline. 



P. Berolin^nsis, Sacc, Mich. I, p. 123. (Plate 12) 



Nectria Ribis, Niessl, (non Tode). 



Pleonectria Rihis, Karst, Synib. Mycol. Feun. VI, p. 42. 

 Exsicc. BU. N. A. F. 470. 



Perithecia erumpent-superficial, cespitose, globose-depressed, J-| 

 mm. diam.", finally collapsing to ciip-shaped, of a brick-red color and 

 loosely-cellular structure. Ostiolum not prominent. Asci cylindrical, 

 subsessile, 90-115 x 10-14 /i, subtruncate above. Sporidia uniseriatei 

 oblong-elliptical, obtuse at each end, 5-7-septate and muriform, not 

 constricted, minutely guttulate, hyaline, 16—22 x 7-8 //. 



On dead stems of Ribes, Canada and the northern United States 

 west to Montana. 



Sec. Dr. Farlow No. 6140, collected in Canada bj- Poe and 

 marked in the Curtis collection Nectviu fetiestrata, B. & C, but in 

 Grev. IV, p. 46, referred to Sphcurostilbe pseudotrichia, (Schw.) and 

 evidently the same as Ell. N. A. F. 470, is different from authentic 

 specimens of Sphceria psendotrichia, Schw. (from Surinam), which, 

 besides its peculiar shaped conidia, has the ascosporcs larger, about 

 38 ji, with a crenulated outline. 



P. denigrata, Winter, Bull. Torr. Bot. Club X, p. 48. 



Exsicc. Rabh. Winter Fungi 2948.— Ell. and Evrht. N. A. F. i,i34, 2372. 



Perithecia erumpent-superficial, forming dense, pulviiiate-hemis- 

 pherical tufts 3-5 mm. diam., seated on a pulvinate stroma which is of 

 a dirty yellow within, nearly globose, gray outside, becoming black, 

 360^70 n diam., at length depressed and umbilicate at the vertex. 

 Ostiolum black, papilliform. Asci cylindrical, briefly stipitate, 8-spored, 

 about 70x8-10/./ (elongated finally in water to 110//). Sporidia 

 generallv monostichous, variable in shape, rounded-subangular, 3-5- 

 septate and muriform, more or less constricted at the septa, pale yel- 

 lowish, 10-16 X 7-10 II. Paraphyses filiform, very long. 



On dead branches of Gleditschia triacanthus, Kentucky (Keller- 

 man), Ohio (Morgan), Delaware (Commons), Missouri (^Vebber). 



P. Missouriensis, (E. & E.) 



Nectria Missourierais, E, & E. Journ. Mycol. IV, p. 57. 



Perithecia cespitose, erumpent-superficial (6-20), globose, \-\ 

 mm. diam., seated on an inconspicuous atroinatic base, dark red. 

 sprinkled with small yellowish granules. Ostiolum papilliform and 

 distinct. Asci clavate-oblong, 100-120x15-20 ji (p. sp. 75-85 //), 



