806 SPH^RIACEI. 



2417. Dothidea junci. Fr. " Rush Dothidea.". 



Spermogonia. — Oblong, irregular, flat, shilling ; disc tawny ; 

 spermatia ? — Leptostroma juncinam^ Fr. exs. no. 330. Berk. Ann. 

 N.H. no. 108. Berk. exs. no. 197. 



AscoPHORE. — Covered, at length bursting by longitudinal 

 chinks between the fibres, tuberculated ; cells in rows, black 

 within, at first immersed in a black stroma; sporidia biseriate, 

 yellowish-brown, linear-acuminate, triseptate. — Fr. S.V.S. p. 

 387. Fckl. exs. no. 1020. Berk. exs. no. 35. Phyllacliora junci, 

 Fckl. Sym Myc.p. 216. Sphceria junci, Fr. S.M. li.p. 428. Eng. 

 Fl.Y.p. 256. Fries exs. net). Moug.exs. no. 964. Curr. Linn. 

 Trans, xxii. t. 49, /. 1 99. Cooke exs. no. 243. 



On stems of rushes. Common. 



Sporidia ('0012) "03 m.m. long. According to Fuckel the sporidia are 

 simple, uniseriate, and ovate. 



2418. Dothidea graminis. Fr. '• Grass Dothidea." 



Covered, unequal, rugulose, rather prominent, black ; cells 

 disposed indistinctly in rows, latent, as well as the ostiola; spo- 

 idia colourless, broadly elliptical, frequently with a large globose 

 nucleus. — Fr. S.V.S. p. 387. Pliyllachora graminis. Fckl. Sym. 

 Myc. p. 216. Sph. graminis, Pers. Syn.p. 30. Fr. S.M. ii.p. 434. 

 Eng. Fl.Y.p). 257. Nees. f. 314. Fries, exs. no. 282. 31oug. exs. 

 no. 876. Curr. Linn. Trans, xxii. t. 49,/. 211. Fckl. exs. no. 1018. 

 Cooke exs. no. 185. 



On half dead leaves of grass. Common. 



2419. Dothidea cazicis. Fr. " Sedge Dothidea." 



Covered, unequal, confluent, black, tuberculose from the pro- 

 minent cells; sporidia? — Fr. S.V.S. p. S87. Sph. caricis, Fr. 

 S.3I. ii._p.435. B. ^ Br. Ann. N.H. no. 604. 



On leaves of Carices. Forfarshire. 



2420. Dothidea Johnstoni. B. ^^ Br. " Johnston's Dothidea," 



Spots minute, orbicular ; cells concentric, half-free ; asci short; 

 sporidia obovate-oblong,uniseptate. — B. ^Br. Ann. N.H. no. 661. 



On leaves of Epilobium. Berwick. 



Forming little black spots about a line broad, studded with concentric 

 half-free cells, with a little round aperture ; there are sometimes a few scat- 

 tered short stitFbrown hairs on the surface, occasionally converging over tie 

 orifice. Asci short, subcylindrical, generall}' rather thicker below ; sporidia 

 biseriate, obovato- oblong, at length pale-brown^ uniseptate. Habit almost 

 that of Sphceria rumicis. - B.tSc Br. 



