55. Graphina] 15. GRAPHIDACEAE 113 



7. Phaeographis erumpens (Nyl. ) Mull. Arg., Bull. Herb. Boiss. 3:48. 1895. 



Graphis erumpens Nyl., in Hue, Lich. Exot. 240. 1892. 



Thallus thin, smooth, pale olivaceous to whitish, somewhat shining; apothecia 

 short and moderately wide, 0.5-2 X 0.2-0.3 mm., straight to curved and infre- 

 quently branched, immersed and wholly covered by the thin thallus or partly 

 immersed, and the disk finally open, concave to flat, whitish pruinose to dull black, 

 the exciple thin, black, covered laterally by a thin thalloid one; hypothecium thin, 

 brownish black; spores 8, oblong, 5-7-septate, 23-30 X 6-9 it. 



On trees, from North Carolina to Florida, and in Louisiana. 



8. Phaeographis haematites (Fee) Mull. Arg., Flora 65:384. 1882. 



Graphis haematites Fee, Essai Crypt. 45. pi. 12, f. 1. 1824. 



Thallus very thin, smooth, greenish gray to olive-brown, more or less shining; 

 apothecia becoming long and wide, 2-5 X 0.3-0.5 mm., immersed to partly im- 

 mersed, straight, curved, or flexuous, often closely grouped, but rarely branched, 

 the disk soon open, concave to flat, red varying toward blackish, the exciple thin, 

 reddish brown to brown; hypothecium hyaline or tinged brownish; spores 8, 

 oblong-ellipsoid, becoming brown, 5-9-septate, 20-35 X 8-10 /x. 



On trees, southwestern Florida. 



9. Phaeographis inusta (Ach.) Mull. Arg., Flora 65:383. 1882. 



Graphis inusta Ach., Syn. Meth. Lich. 85. 1814. Opegrapha inusta (Ach.) 

 Tuck. Graphis dendritica var. inusta (Ach.) Tuck. 



Thallus thin, smooth, pale greenish gray, varying toward whitish or pale oliva- 

 ceous; apothecia moderately long and wide, 1-5 X 0.25-0.45 mm., obtuse at the 

 ends, immersed to partly immersed, straight to curved or slightly flexuous, rarely 

 branched, the disk open, flat, brownish black to black, the exciple thin, dark brown 

 to black, surrounded by a thin, disappearing, thalloid one; hypothecium hyaline; 

 spores 8, oblong-ellipsoid, 5-7-septate, 20-36 X 6-9 /x. 



On trees, from Massachusetts to Florida, Louisiana, and California. 



10. Phaeographis lobata (Eschw.) Mull. Arg., Flora 65:383. 1882. 

 Leiogramma lobatum Eschw., in Mart., Fl. Bras. 100. 1829. 



Thallus very thin or wholly within the substratum, greenish gray, varying to- 

 ward whitish or olivaceous; apothecia small, 0.5-1.3 X 0.4-0.8 mm., immersed 

 to partly immersed, circular to shortly oblong, the disk open, flat, brownish black 

 to black or obscurely grayish pruinose, the exciple thin, raised, and blackish; 

 hypothecium hyaline; spores 8, finally brown, oblong-ellipsoid, 5-9-septate, 25- 

 38 X 7-9.5 ft. 



On wood, Florida and Louisiana. 



OTHER SPECIES REPORTED 

 Phaeographis patellula (Fee) Mull. Arg. — Florida and Louisiana. 



'55. Graphina Mull. Arg., Flora 63:22. 1880. 



Thallus forming a thin, usually smooth crust, partly or wholly within the 

 substratum, devoid of differentiation into layers; apothecia linear, curved, often 

 branched, more or less immersed, the disk closed to open, commonly black, the 

 exciple colored like the disk, often surrounded by a thin to thicker thalloid one; 

 hypothecium hyaline to brownish black; hymenium hyaline; paraphyses un- 

 branched, commonly distinct; asci clavate to cylindrico-clavate; spores 1-8, hya- 

 line, oblong-ellipsoid, ellipsoid, or long-ellipsoid, transversely and longitudinally 

 septate, the cells almost cubical. 



The algal host is Trentepohlia. 



A. Spores 8 or rarely 6 in each ascus 

 B. Spores rarely less than 30 m in length 



C. Spores large, reaching 60-75 /x in length 



D. Spores 5-11 -septate transversely 10. G. platycarpa 



D. Spores 13-23-septate transversely 18. G. virginea 



