864 SPH^RIACEl. 



2586. Sphseria collabens. Curr. " Collapsing Sphseria.*' 



Perithecia siibglobose, with an impressed ostiolum, which is 

 often furrowed or rimose ; sporidia biseriate, fusiform, swollen, 

 or constricted in the middle, with several nuclei, colourless. — 

 Curr. Linn. Trans, xxii.p. 320, ^ 58,/. 51. 



On bark and wood. 



Sporidia (•0014-"0016 in.) •03.-04 m.m. The sporidia and perithecia agree 

 nearly with S. macrotricha , but the perithecia have no hairs, the habitat is 

 a' so different. The sporidia resemble also those of S. sca6/-a, but, besides 

 being smooth, the perithecia are four times the size of those of S. scalra.-^ 

 F.C. 



var. Curreyi. Blox. Contents of perithecia rose-red ; 

 sporidia rarely exceeding '0010 in. in length. — SphcBria Curreyi^ 

 Blox. Curr. Linn. Trans, xxii.^. 320. Berk. Outl. p. 396. 



There does not appear to be sufficient reason to regard this form as a dis- 

 tinct species. 



2587. Sphaesria pulviscula. Curr. " Powdery Sphseria." 



Perithecia very small, black, rather shining, conical or sub- 

 globose, crowded or scattered ; ostiola minute, maKallate ; spori- 

 dia curved, or cymbiform, colourless, triseptate. — Curr. Linn. 

 Trans, xxii.^. 320, t. 58,/. 52. 



On wood. 



Sporidia biseriate, curved or cymbiform, colourless or greenish, when 

 perfect with three septa, or at least with the endochrome divided into four 

 portions, giving an appearance of three septa, sometimes the tndochromeis 

 only once divided, and in a young state the sporidia are continuous. Length 

 variable (•0008--aOI2 in.) •02--03 m.m.-i^.C. 



% Sporidia coloured. 



2588. Sphseria confluens. Tode. " Confluent Spheeria." 



Perithecia subglobose, rugulose, seriato-confluent, black, de- 

 pressed around the ostiola. — Tode t. 10,/. 87. B. ^ Br. Ann. N. 

 H. no. 597. Fr. S.M. ii.p. 342. Fckl. exs. no. 2177. 



On decayed wood, as oak, willow, &c. Bristol. 



Fuckel states that the sporidia are oblong, nearly straight, brown; and 

 refers it to Hypoxylon udum. 



2589. Sphaezia xnammsefozmis. JPers. '' Mamillate 



Sphaeria." 



Large, black ; perithecia thin, globose, even ; ostiolum papil- 

 leeform ; sporidia dark, clear brown, subcymbiform, variable in 



