115 



alliaceous, papillate. Asci 8-spored. Sporidia, when raatare, pluri- 

 jeptate-muriform, hyaline. 



P. Berolinensis, Sacc. Mich. I, p. 123. (Plate 12) 



Nectria Ribis, Niessl, (non Tode). 



Pleonectria Ribis, Karst, Symb. Mycol. Fenn. VI, p. 42. 

 Exsicc. EH- N. A. F. 470. 



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

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

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

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

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

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



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

 west to Montana. 



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

 marked in the Curtis collection Nectria fenestrate B. & C, but in 

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

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

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

 besides its peculiar shaped conidia, has the ascospores Larger, about 

 38 /Jt, with a crenulated outline. 



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



Exsicc. Rabh. Winter Fungi 2948. EH. and Evrht. N. A. F. 1334, 2372. 



Perithecia erumpent-superficial, forming dense, pulvinate-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, 

 360-470 fi diam., at length depressed and umbilicate at the vertex. 

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

 about 70 x 8-10 fi (elongated finally in water to 110//). Sporidia 

 generally monostichous, variable in shape, roundcd-subangular. 3-6- 

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

 lowish, 10-16 x 7-10 ft. Paraphyses filiform, very long. 



' On dead branches of Gleditschia triacanthus Kentucky (Keller 

 man), Ohio (Morgan), Delaware (Commons), Missouri (Webber). 



P. Missouriensis, (E. & E.) 



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



Perithecia cespitose, erumpent-superficial (6-20 1. globose, \-\ 

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

 sprinkled with small yellowish granules. Ostiolum papillifonn and 

 distinct, Asci clavatJ-oblong, 100-120x15-20 a (p. sp. 76-81 



