SPH^EIACEI. 



931 



Gen. 365. ISOTHEA, Fr. 



Nucleus without a peiitheciuui, 

 coloured, or black, covered by the 

 transformed substance of the 

 matrix, or immersed therein. — Fr. 

 S.V.S.j^. 421. (.P/^.405.) 



2801. Isothea rhytismoides. Fr. 



'• Pitchy Isothea." 



Cells globose, scattered, or 

 crowded, covered by the polished, 

 Fig. 405. blackened, cuticle, contents salmon- 



colouied ; ostiola very small, obso- 

 lete ; asci clavate ; sporidia oblong, obtuse. — Fr. S.V.S.p. 421. 

 Sph. rhytismoides, Bah. Abst. Linn. Trans, p. 32. Berk, exs.no. 

 324. Berk. Ann. N.H. no. 178,^.10,/. 9. Ciirr. Linn. Trans. 

 xxii. t. 49,/. 209. Sphceria dryadis, Fckl. exs. 21 Gl. 



On leaves of Dry as. Sept. Sutherlandshire. 



Epiphyllons occupying the whole surface, or detached portions of the leaf; 

 cells generally scattered, sometimes confluent in the former case, the epider- 

 mis between them is cinereous, but above them raised, jet-black and shinii g 

 mouth simple, very minute. Contents salmon-col ured, containing clavate 

 asci, with linear paraphyses. Sporidia biseriate, oblong, obtuse, sometin.es 

 containins: two sporidiola. 



Sporidia (-0006 in.) 'Olo m.m. (Fig. 405.) 



2802. 



Isothea pustula. Ferh. " Oak-leaf Isothea. 



Unilocular, convex, even, reddish-brown, white within, con- 

 tents black ; asci clavate; sporidia oblong. — Berk. Outl.p. 392. 

 Pliornn pushila, Fr. S.M. ii. p. 547. Fries, exs. no. 205. Berk, 

 exs. no. 40. Eng. Fl. v. p. 284. Sph. pustula, Pers. Ann. 11, f. 2, 

 /. 7, h. Pers. Syn ;;. 91. Fckl. Syrn. Myc. t. vi./. 33. 



On fallen oak leaves. Common. [Mid. Carolina.] 



2803. 



Isothea immunda. Coolie. " Small Oak Isothea. 



Unilocular, sometimes plurilocular (one-third the size of those 

 in /. pustula), black, plane, or a little convex ; asci linear, curved ; 

 sporidia uniseriate, ovate, uniseptate, hyaline. — Spihceria immunda, 

 Fckl. exs. no. 843. Sym. Myc. p. 108, t. 3,/. 10 a. h. 



