i^04 SPH^RIACEI. 



tisei^tate, the second joint swollen. — Tocle. f. 88. Fr. S.M. \\.p. 

 508. Fr.exs.no.U. Eng.Fl. Y.p.21b. B. ^ Br. Ann. N.H.no. 

 644. Lejitospharia complanata. De Not. Schema^ p. 62. 



On herbaceous stems. [Up. & Mid. Carolina.] 



Very variable in size. 



2714. Sphaeria derasa. B.^^Br. " Ragwort Sphceria." 



Gregarious, small, black, hemispherical, covered with rigid 

 black hairs, which ultimately disappear — except at the base ; 

 asci clavate ; sporidia biseriate, fusiform-filiform, slightly curved, 

 with a row of nuclei, at length faintly septate. — B. ^' Br. Ann. 

 no. 639*, t. xi.f. 25, b. S. calva, Johnst. Fl. Berw. 



On ragwort stems. Spring. 



One of the articulations of the sporidia is sometimes swollen. 



2715. Sphaeria vectis. B. S^' Br. " Iris Sphseria." 



Subcuticular; ostiola at length naked ; asci short, cylindrical ; 

 sporidia oblong, 5 septate, the fourth articulation swollen. — B. ^ 

 Br. Ann. N.H. no. 779, 1. 16,/. 16. Leptosphceria vectis, De Not. 

 Schema p. 62. 



On dead leaves of Irisfcetidissima. 



Covered by the cuticle, whicli is at length pierced by the black ostiolum, 

 sometimes regularly diffused, sometimes forming little pale patches ; asci 

 short, curved, cylindrical; sporidia oblong ("0001 in.) "0025 m.m. long, 5-sep- 

 tate, the fourth joint being much swollen. — B. 4* -Sr. 



2716. Sphaeria nigxans. Besm. " Black Grass Sphceria." 



Minute, scattered, covered with the blackened epidermis ; pe- 

 rithecia globose or subelliptic, depressed, base invested with 

 brownish hairs; ostiola erumpent, papilla^form ; asci clavate ; 

 sporidia fusiform, curved, subhyaline, 5-septate. — Desm. Ann. Sc. 

 Nat. 1846. Exs. no. 1774. B. ^' Br. Ann. N.H. no. 640, t. 11,/. 

 27. Leptosphairia nigrans, De Not. Schema ^. 6] . 



On Dactylis glomerata. Feb. 



In a certain stage of growth the black stroma-like spots are not visible, 

 but there are merely a few creeping flocci at the base of the perithecia, these 

 gradually increase in number, so as at length to form a thin dark stratum. 

 The species may be recognised in any state by the fusiform spores, the middle 

 joint of which is swollen. Besides the true paraphyses there are jointed 

 threads in the perithecia. — B. 4" Br. 



