160 PROCEEDINGS OF THE ACADEMY OF [1893. 



dytispora annulata E. & E. 



On dead limbs of Neg undo aceroides with Sphozropsis albescens E. 

 .& E., Brookings, South Dakota. Oct., 1891. (Thos. A. Williams.) 



Stromata minute, convex, multilocular, hardly exceeding 1 mm. 

 in diam., subcuticular, slate-color inside, furnished with a single 

 central pore which opens through the apex of a minute pustule and 

 is surrounded by a minute light colored ring. Sporules oblong, 

 straight or only slightly curved, hyaline, continuous, 5-6x1-1 97/. 

 The epidermis is finally blackened directly over the pustules, except 

 Ihe ruptured margin which forms a pale ring around the ostiolum. 



This differs from G. macilenta Rob. and Desm. as shown by the 

 specc. in Desm. exsicc. in its much smaller sporules and more 

 numerous cells. 



Cytispora camea E. & E. 



On basswood bark, Orono, Maine. (F. L. Harvey.) 

 Stromata convex, 3-4 mm. diam., granulose-tomentose and gray- 

 ish-black outside, multilocular and grayish-black, streaked with white 

 -within, uneven above and furnished with 3-4 or more stout ostiola 

 which rupture and raise the epidermis and are crowned with a flesh 

 ■colored globule of discharged sporules which are oblong, hyaline 

 ^under the microscope), obtuse, straight, 8-12 x 3,u. The stromata 

 <do not penetrate deeply into the inner bark and are not circum- 

 scribed by any black line but the bark is more or less blackened. 



Ascochyta rhei E. & E. 



(Phyllosticta rhei E. & E., Journ. Mycol. I, p. 145.) 

 More perfect specc. on leaves of Rheum rhaponticum from Rock- 

 ^port, Kansas (Bartholomew, No. 713), show that this is an Asco- 

 chyta, the sporules becoming uniseptate ; they are also mostly nar- 

 rowed in the middle and are larger than in the Newfield specc. 

 ..(7-12 x 3?-4//..) The spots are about the same only not so distinctly 

 donate, but the perithecia are smaller. 



.Sphaeropsis vitigena E. & E. 



On dead shoots of Vitis (cult.), Rockport, Kansas. Feb., 1892. 

 (E. Bartholomew, No. 507.) 



Perithecia globose, minute, about i mm. diam., numerous, buried 

 in the bark and raising the epidermis into numerous small pustules 

 which are pierced by the papilliform ostiolum. Sporules oblong- 

 -elliptical, brown, 18-20 x 8-10//, not nucleate or septate. 



Quite different from S. viticola Cke. in Rav., F. Am., 542 (on 

 leaves of Vitis), and also from S. uvarum B. & C. (on the fruit.) 



