118 CRYPTOGAMIA-^FUNGI. 



3. S. undulata y crust widely spreading, dull black, even or ir- 

 regular, thickly dotted with the rounded somewhat prominent 

 orifices of the cells ; cells globular, entirely immersed ; interior 



white PERS. Syn. 21. HOOK. Scot. ii. 5- Slromatospharia un<* 



dulata, GREV. Fl. Edin. 356 ; Crypt. Fl. t. 223, f. 1. 



Hab. On dead wood from which the bark has been re- 

 moved, occasionally. 



Principally distinguished from the preceding by the larger, 

 rounded, and more prominent orifices of the cells. 



4. S. atro-purpurea, crust spreading irregularly, blackish .brown, 

 uneven, cracked ; cells entirely immersed, few and small, with- 

 out apparent orifices; interior brown. Bot. Gall. ii. 681. S. vo- 

 gesiaca, MOUG. and NEST., No. 765. 



Hab. On wood without bark, rare. 



Differs from S. stigma and undulata in having fewer cells ir- 

 regularly arranged, and the orifices of which are either in- 

 visible on the surface, or sometimes just perceptible with 

 a magnifier. 



5. S. lata, crust very thin, widely spread, black, even, conti- 

 nuous, dotted with the prominent obtusely conical orifices of the 

 cells, which are rather large, very numerous and immersed in the 

 wood ; interior of the cell white or yellow HOOK. Scot. ii. 6. 

 GREV. Fl. Edin. 357. Bot. Gall. ii. 685. 



Hab. On wood deprived of its bark. 



My specimens were cut from decayed and decorticated 

 branches, probably of Salix aurita. The branches were 

 blackened, and had the appearance of being slightly burn- 

 ed. The crust is very thin, and the cells are merely co- 

 vered by it, for they are immersed in the wood, which is a 

 remarkable character, and distinguishes this well from any 

 of the preceding. 



6. S. flavo-virens, crust unequal, rugose, black, pulverulent, 

 yellowish-green within ; cells subglobose, their orifices somewhat 

 prominent and rounded. PERS. Syn. 22. S. multiceps, Sow. 

 Fung. t. 394. f. 8. Stromatosphceria multiceps, GREV. Fl. Edin. 356. 

 Strom. Jlavo-virens, GREV. Crypt. Fl. t. 320. 



Hab. On dead branches, frequent. 



