108 IS. GRAPHIDACEAE [53. Graphis 



mersed to partly immersed, straight to curved and flexuous, rarely branched, the 

 disk closed, the proper exciple reddish to dark brown, thick and finally striated, 

 covered more or less by an obscure thalloid one; hypothecium hyaline or tinged 

 brownish; spores oblong-ellipsoid, 3-septate, 14-20 X 7-10 /x, uniseriately arranged. 

 On trees, Florida. Spores finally brownish and perhaps nearer Phaeographis. 



8. Graphis subparilis Nyl., Lich. Ins. Guin. 48. 1889. 



Thallus very thin, smooth and shining, pale greenish gray to yellowish olive- 

 green; apothecia long and wide, 4-18 X 0.6-0.8 mm., slightly immersed to super- 

 ficial and much raised, curved, flexuous, abruptly bent or recurved, rarely branched, 

 the disk closed or rarely open and yellow or whitish, the proper exciple reddish 

 brown, becoming 1-3 times striate and wide above, covered above and laterally 

 by a thalloid one; hypothecium hyaline or brownish; spores oblong-ellipsoid, 

 3-septate, 14-20 X 5.5-8 /x. 



On trees, Florida. 



9. Graphis floridana Tuck., Syn. N. A. Lich. 2:126. 1888. 



Thallus thin, smooth, greenish gray to ashy; apothecia much elongated and 

 narrow, 3-10 or more X 0.25-0.35 mm., immersed to partly immersed, crowded, 

 straight to curved or flexuous, infrequently 1 or 2 times branched, the disk closed 

 or open and blackish, the exciple and hypothecium hyaline, the former whitish 

 powdery above and covered laterally by a swollen thalloid one; spores oblong- 

 ellipsoid to ellipsoid, 3-septate, 10-15 X 6.5-9 fx. 



On trees, Florida. 



10. Graphis mosquitensis Tuck., Syn. N. A. Lich. 2:126. 1888. 



Thallus thin, becoming slightly rough and scurfy, greenish gray varying to- 

 ward whitish, bounded and intersected more or less by black lines; apothecia 

 short and narrow, 0.5-2 X 0.15-0.2 mm., immersed to partly immersed, straight 

 to curved or obscurely flexuous, the disk closed to finally open and black, the 

 proper exciple black above and pale and inconspicuous below, covered at first 

 wholly, then laterally by a finally disappearing thalloid one; hypothecium hyaline; 

 spores ellipsoid, 5-9-septate, 16-25 X 5-8 fi. 



On trees, Florida. Tuckerman's diagnosis does not agree with the type material. 



11. Graphis Pavoniana Fee, Essai Crypt. 40. 1824. 



Thallus moderately thick, becoming wrinkled, or granulose, pale greenish gray 

 to whitish; apothecia very long, but narrow, 3-10 or more X 0.16-0.3 mm., more 

 or less immersed, curved and flexuous, often running roughly parallel, sometimes 

 more or less branched, the disk closed, the exciple black, pruinose above and cov- 

 ered laterally by a thalloid one when not wholly immersed; hypothecium hyaline; 

 spores oblong-ellipsoid, 5-9-septate, 18-37 X 6-9 /x. 



On trees, Texas. 



12. Graphis atrorubens Tuck.; Hedrick, Mycologia 25:312. 1933. 



Thallus moderately thick, smooth to somewhat rough and chinky, greenish 

 gray; apothecia moderately long and narrow, 0.1-4 X 0.2-0.4 mm., partly im- 

 mersed to subsuperficial, usually curved to flexuous, seldom branched, the disk 

 closed to open and reddish black, the exciple and the hypothecium reddish brown, 

 the former covered laterally by a finally disappearing thalloid one; spores hyaline, 

 or brownish when old, oblong-ellipsoid, 5-7-septate, 18-28 X 5-7 /x, resembling 

 Opegraphae. 



On trees, South Carolina, Florida, and Georgia. 



13. Graphis tenella Ach., Syn. Meth. Lich. 81. 1914. 

 G. scripta var. tenella (Ach.) Tuck. 



Thallus thin to moderately thick, smooth, greenish gray to whitish or rarely 

 yellowish; apothecia becoming long and narrow, 1-5 X 0.17-0.22 mm., partly 

 immersed, straight to curved or flexuous, seldom branched, the disk closed, the 



