816 BPH^RIACEI. 



2448. Diatrype frangulae. Pers. " Buckthorn Diatrype." 



Peritliccia not circinating, united by a distinct crust or stroma; 

 asci somewhat clavate ; sporidia biseriate or crowded, colourless, 

 illiptic-acuuiinate ; endochrome quadripartite, sometimes only 

 liipartite. — Pers. Kew. Herh. Sphceria synrjenesia, Fr. (in part). 

 Curr. Linn. Trans, xxii. t. 47,/. 119. Diatrype syngenesia^ Cooke 

 Seem. Journ. Diaporthe syngenesia^ Fckl. Sym. Myc.p. 204. Valsa 

 appendiculosa, Fckl. exs.no. 601. Cooke exs. no. 367. 



On elder and Rhamnus frangula. 



The pporidia are only qua dri nucleate until mature, each extremity is 

 often shortly appendiculate (-OOOS-'OOOG in.) •U127-*015 m.m. long. 



D. Sporidia coloured. 



2449. Diatrype dxyophila. Curr. " Dart-spored oak 



Diatrype." 



Perithecia ovate or subglobose ; stroma dirty green, necks 

 long, convergent, piercing the bark ; asci linear ; sporidia uni- 

 seriate, dark, oblong, narrow, sometimes binucleate. — Curr. Linn. 

 Trans, xxii.;?. 269, t. 46,/. 75. B. ^ Br. Ann. N.H. no. 832. 



On dead oak twigs. 



Sporidia (•0004-*0006 in.) '01-' 015 m.m. long. Perithecia surrounded by 

 a dirty green stroma, rather deeply buried, piercing the bark by their long 

 converging necks, forming compact, scattered black pustules. Sporidia 

 uniseriate, narrowly elliptical, sub-acuminate at each end, at first of a pale 

 greenish brown, then darker, eventually almost black, when young with two 

 or more nuclei in each sporidium. — F.C. 



2450. Diatrype denigrans. Curr. " Tubercular Diatrype." 



Perithecia conical or depressed, with long ostiola, penetratiug 

 the bark, and raising the wood into minute prominent black 

 tubercles ; sporidia dark, elliptic. — Cu7t. Linn. Trans, xxii. ^.46, 

 /. 78. B. ^ Br. Ann. N.H. no. 835. 



On twigs. 



Sporidia ("0005 in.) '0127 m.m. long, uniseriate, often partly overlapping, 

 dark olive brown, elliptical bi-, tri-, or multi-nucleate, sometimes quite 

 simp e. Perithecia deej-ly set in the wood ; when a tuft of them is cut trans- 

 versely there is a black line round them which is very well defined. 



2451. Diatrype cincta. B.^^Br. " Girdled Diatrype." 



Perithecia irregularly ovate, closely packed in a compact, 

 leathery conceptacnlum ; ostiola bursting the bark, forming 



