SPH^EIACEI. 881 



2641. Sphaeria xylostei. Pers. " "Woodbine Sphgeria." 



Macrostylospores — Oblong, ovate, constricted, brown, 3-5 

 septate, muriform. 



Pycxidia. — Stylospores didymous, oblong, dark brown. — 

 Diplodia Loniceroe, Fckl. exs. no. 1951. 



AscoPHORE. — Gregarious, staining black ; perithecia covered, 

 emergent, entire, globose ; ostiola slightly prominent, seated on 

 a black spot, at length pierced ; sporidia dark brown, bordered, 

 elliptical. — F7\ S,M. ii.p. 487. Fries, exs. no. 189. Eng. Fl. \.p. 

 270. Curr. Linn. Trans, xxii. t. 58,/. 84. S. semi-immersa, Grev. 

 Fl. Ed. p. 361. Didymosphreria xylostei, FcM. Sym. Myc.p. 141. 

 Fckl.exs.no. 914. Arnphisph^Bria xylostei, De Not. Sfer.Ital.no, 

 74. 



On woodbine. 



Sporidia (-OOOG-'OOO? in.) •015--0175 m.m. long. 



2642. Sphaeria decedens. Fr. " Immersed hazel Sphasria." 



Gregarious ; perithecia globose, immersed, black, neck straight ; 

 ostiola erumpent, lacerating the epidermis. — Fries, exs. no. 81. 

 Berk. Mag. ZooL ^ Bot. no, 24. Nees.f. 340. Fr. S.M. ii.p. 481. 



On hazel. 



Perithecia sometimes solitary, sometimes crowded, immersed in the inner 

 bark, attenuated into a short neck.— i^j-tes. 



2643. Sphaeria discutiens. Berk. " Sunken Elm Sphseria." 



Broadly effused ; perithecia sunk in the inner bark, at length 

 throwing off the epidermis by means of their long, cylindrical, 

 rather scabrous ostiola, covered with a dull black stroma ; spori- 

 dia biseriate or crowded, 1-3 septate, colourless, almond-shaped. 

 — Eng. Fl. v. p. 245. Curr. Linn. Trans, xxii, t. ^1 ,f. 112. 



On elm branches. 



Perithecia deeply buried. Ostiola long and protruding. Sporidia ("0005 

 in.) *0127 m.m. long. 



2644. Sphaeria fraxinicola. Curr. " Concealed Ash 



Sphasria." 



Perithecia sub-lageniform ; ostiolum pointed or nipple-like, 

 base sometimes adnate, piercing the bark ; sporidia uniseriate, 

 elliptical, biseptate, colourless. — Curr. Linn. Trans, xxiv. t. 25, 

 /. 34. B. ^. Br. Ann. N.H. no. 1 098. 



On dead ash branches. Sept. Near Lewes. 



2p 



