407 



Perithecia mostly thickly scattered, gregarious, or occasionally 

 standing singly, permanently covered by the slightly raised epidermis, 

 depressed-globose, mostly concentrically furrowed or zoned, and urn- 

 bilicate, the apex reddish, perforated and slightly erumpent. Ostiolum 

 tolerably large, black, surrounded by a black, crustaceous mass. Asci 

 cylindrical, attenuate-stipitate below, obtuse above, 8-spored, par- 

 aphysate, 150-170x10-12 [i. Sporidia uniseriate, oblong, slightly 

 attenuated and rounded at the ends, mostly 3-septate, constricted at 

 the septa, brown, generally with one or two of the inner cells divided 

 by a longitudinal septum, 18-27 x 7-9 /i. 



On Rhamniisfranyula, in Sweden, Germany, England and Italy. 



We find no record of this species having been met with in this 

 country, and when the drawing on plate 30 was made, we were not 

 aware that any species of Pleomassaria had been found here, but had 

 the sporidium (from specc. in Krieger's Fungi Saxonici) figured to 

 illustrate that genus. Since then, PL siparia and PL Carpini have 

 been found in Iowa and New York, and the diagnosis of PL rhodos- 

 toma has been added in anticipation of that species also being yet 

 found in America. The genus JTarstenvla, Sacc, distinguished from 

 Pleomassaria only by the absence of any gelatinous envelope around 

 the sporidia, can hardly be worthy of generic distinction. 



PL siparia, (B. & Br.) 



Sphceria siparia, B. & Br. Not. Brit. Fungi No. 625. 

 Massaria siparia, Ces. & De Not. Schema, p. 43. 

 Pleomassaria siparia, Sacc. Syll. 3708. 

 Exsicc. Fckl. F. Rh. 201 1, Rab. F. F. 260. 



Perithecia scattered or oftener crowded and subconnate, attached 

 to the inner bark and covered by the pustuliform-elevated epidermis, 

 depressed-spherical, |-J mm. diam. (exceptionally 1 mm.), black, the 

 minute ostiolum piercing the epidermis, finally umbilicate. Asci cla- 

 vate, very large, attenuate-stipitate, (190-210x38-44 /jl Winter). 

 8-spored, paraphyses very long and filiform. Sporidia elliptic-oblong, 

 gradually and only slightly narrowed towards each end, obtuse, 7-8- 

 septate and constricted at the septa, the middle cells divided by a 

 longitudinal septum, golden-brown, 56-65x15-17 //, with a gelatin- 

 ous envelope. 



On birch, Decorah, Iowa (Holway). 



The Iowa specc. were immature, the sporidia being still hyaline. 

 35-85 x 5 6 /j. (mostly 40-60 x b-% //), vermiform-cylindrical, 5-6-nu- 

 cleate and granular. 



PL Carpini, (Fckl.) 



Massaria Carpini, Fckl. Symb. p. 153, tab. VI, fig. 35. 

 Pleomassaria Carpini, Sacc. Syll. 3710. 

 Fxsicc. M. March. 1928. Krieg. F. Sax. 234. 



