360 PROCEEDINGS OF THE ACADEMY OF [1894. 



Stroma cortical, convex, l2-2 ram. diam. , slaty black, 4-6-celled, 

 cells yellowish-white, subglobose, small. Sporules allantoid, 

 hyaliue 3^-4 2 x l-l//. 



(Spermogania of Valsa caryigena, B. & C. )? 

 Cytispora exasperans E & E. 



Oil dead limbs of Acer rubrnm, Newfield, N. J., and on Acer 

 Pennsylvanieam, Nuttallburg, West Va. (Nuttall). 



Stroma buried in the bark, orbicular, about 1 ram, diam., 4-6- 

 celled (at length one-celled), prolonged above into a stout, conical 

 beak opening by a single round pore at the apex. Sporules oblong 

 or allantoid, hyaline, 5-7 xli,". 



Cytispora Celtidis E. & E. 



On dead limbs of Celtis, Nuttallburg, West Va., Feb. 1894 (L. 

 W. Nuttall, No. 314). 



Stroma valsoid, flat, thin, li-2 mm. diam., only peuetrating the 

 surface of the bark, multilocular, gray inside, raising the bark into 

 small pustules and finally rupturing it, cells resembling perithecia. 

 Sporules allantoid, 6-7 x 1-1 2//.. 

 Cytispora plilyctsenoides E. & E. 



On dead limbs of Corylus Avellana, Newfield, N. J., June, 1894. 



Stroraata cortical, conic-convex, 1-1 J mm. diam., indistinctly 

 multilocular, pale inside, with the enclosing layer darker, raising 

 the epidermis into numerous small pustules which are soon ruptured, 

 opening mostly through a single pore. Sporules fusoid, hyaline, 

 2-nucleate, 6-9x2-24/', straight. Basidia simple, attenuated and 

 curved above, about 20 x Ij;/, resembling the sporules of Phlyctcena. 



Cytispora Negundinis E. & E. 



On dead limbs of Negundo aceroides, Rockport, Kansas, April, 

 1894 (Bartholomew, No! 1,449). 



Stroma cortical, conic-convex, 1-H mm. diam., slaty black, mul- 

 tilocular, the cells ovate-globose, numerous (15-20 or more), all 

 opening through a single pore in a central column which pierces the 

 epidermis and raises it into little pustules. Sporules allantoid, hya- 

 line, slightly curved, 52-7 x 1 i-l 2//. On branched basidia 20/' long. 



This is different from C. macilenta Rob. and Desm. , as shown by 

 a comparison of the specc. From C. Pseiidoplatani Sacc. , it differs 

 in its longer sporules and branching liasidia. 



