116 IS. GRAPHIDACEAE [55. Graphina 



8. Graphina subnitida (Nyl.) Zahlbr., Cat. Lich. Univ. 2:427. 1924. 



Graphis subnitida Nyl.; Leight, Trans. Linn. Soc. Lond. 25:453. pi. 56, f. 14. 

 1866. Fissurina subnitida Nyl. 



Thallus thin, smooth, somewhat shining, pale yellowish to olive-green; apothe- 

 cia short to longer, but narrow, 1-3 X 0.15-0.25 mm., immersed, straight to curved 

 or fiexuous, sometimes branched, often clustered, the disk becoming open and 

 whitish, the proper exciple pale brown, covered by a thin thalloid one; hypothe- 

 cium hyaline; spores 8, oblong-ellipsoid, 5-7-septate transversely and 1-3-septate 

 longitudinally, 25-40 X 12-18 /a. 



On trees, near Covington, Louisiana. 



9. Graphina subnitidula (Nyl.) Zahlbr., Cat. Lich. Univ. 2:427. 1924. 

 Graphis subnitidula Nyl., in Tuck., Syn. N. A. Lich. 2:123. 1888. 



Thallus thin, smooth, shining, greenish gray to olive-green or yellowish; apo- 

 thecia short to somewhat elongated, but narrow, 2-5 X 0.15-0.25 mm., immersed, 

 curved, and fiexuous, becoming sparingly branched and often occurring in radiating 

 groups, the disk becoming open and whitish, the proper exciple brownish, covered 

 by a raised thalloid one; hypothecium hyaline; spores 8, oblong-ellipsoid, 7-9- 

 septate transversely and 1-septate longitudinally, 20-30 X 6-9 fx. 



On trees, Florida and Louisiana. 



10. Graphina platycarpa (Eschw.) Zahlbr., Sitz. Akad. Wein. Math. Nat. Classe 



111:385. pi. 2, f. 14-17. 1902. 

 Graphis platycarpa Eschw., in Mart., Fl. Bras. 1 :74. 1835. G. sophistica (Tuck.) 

 Mull. Arg. Graphis scripta var. sophistica Tuck. Graphis sophistica (Tuck.) 

 Nyl. 

 Thallus smooth, thin to moderately thick, greenish gray to ashy; apothecia 

 becoming much elongated, but rather narrow, 3-8 or 10 X 0.2-0.4 mm., partly 

 immersed to adnate, straight to curved or fiexuous, frequently and sometimes 

 much radiately branched, the disk closed or narrowly open and black, the proper 

 exciple black and finally striate, covered laterally by a disappearing thalloid one; 

 hypothecium hyaline; spores 6-8, oblong-ellipsoid, 5-1 1-septate transversely and 

 1-7-septate longitudinally, 30-64 X 8-30 fi. 

 On trees, Florida. 



11. Graphina substriatula (Nyl.) Zahlbr., Cat. Lich. Univ. 2:427. 1924. 

 Graphis substriatula Nyl., Act. Soc. Sci. Fenn. 7:467. 1863. Graphis elegans 



var. substriatula (Nyl.) Tuck. 



Thallus thin, smooth, greenish gray to dull whitish; apothecia becoming long, 

 but narrow, 1-5 X 0.2-0.35 mm., partly immersed, curved and fiexuous, rarely 

 branched, the disk closed, the proper exciple black or whitish pruinose, sometimes 

 obscurely striate, covered more or less laterally by a thalloid one; hypothecium 

 hyaline; spores 4-8, ellipsoid, 9-13-septate transversely and 1-5-septate longitu- 

 dinally, 30-40 X 10-15 (i. 



On trees, Florida. 



12. Graphina leprocarpa (Nyl.) Zahlbr., Cat. Lich. Univ. 2:412. 1924. 

 Graphis leprocarpa Nyl., Act. Soc. Sci. Fenn. 7:472. 1863. Thelotrema lepro- 



carpum (Nyl.) Tuck. 



Thallus very thin, smooth to slightly rough, pale greenish gray to whitish; 

 apothecia round, irregular to oblong, 3-6 X 3-4 mm., immersed, the disk sunken 

 but flat to convex, pale, the proper exciple pale and rudimentary, covered by the 

 thallus or by an irregular and often torn thalloid exciple; hypothecium hyaline; 

 spores 1, 2, 4, or rarely 6 or even 8, oblong, 9-13-septate transversely and 3-5- 

 septate longitudinally, 25-100 X 8-20/*.. 



On trees, Louisiana. 



13. Graphina acrophaea Mull. Arg., Bull. Herb. Boiss. 3:46. 1895. 



Thallus thin, smooth to slightly granulose and uneven, greenish gray to ashy, 

 usually bordered by a dark line; apothecia short to somewhat elongated, but 



