55. Graphina] 15. GRAPHIDACEAE 115 



3. Graphina leuconephela (Nyl.) Zahlbr., Cat. Lich. Univ. 2:413. 1924. 

 Fissurina leuconephela Nyl., Flora 52:73. 1869. Graphis leuconephela (Nyl.) 



Kremphl. 



Thallus mainly or wholly within the substratum, indicated at the surface by a 

 greenish gray to olive-green coloration; apothecia seated in whitish areas of the 

 thallus, short and of medium width, 0.5-2 X 0.2-0.5 mm., immersed and straight 

 to curved or flexuous, sometimes branched or confluent, the disk closed or nar- 

 rowly open, whitish, the proper exciple and hypothecium hyaline, the former 

 covered by a thalloid or substratic layer, not forming an exciple; spores 8, long- 

 ellipsoid, 3-5-septate transversely and 1-2-septate longitudinally, 15-26 X 8-12 fi. 



On trees, Louisiana. 



4. Graphina sophisticascens (Nyl.) Zahlbr., Cat. Lich. Univ. 2:425. 1924. 

 Graphis sophisticascens Nyl., Lich. Jap. 108. 1890. 



Thallus thin, smooth, greenish gray to ashy; apothecia rather short and 

 narrow, 0.5-2.5 X 0.15-0.35 mm., slightly immersed, straight to curved or obscure- 

 ly flexuous, very rarely and sparingly branched, the disk closed to widely open and 

 brownish black or whitish pruinose, the proper exciple black, covered laterally by 

 a thin, disappearing, thalloid one; hypothecium hyaline; spores 8, oblong, 3-septate 

 transversely and 1-septate longitudinally, 18-23 X 9-14 fx. 



On trees, Missouri. 



5. Graphina virginalis (Tuck.) Mull. Arg., Bull. Herb. Boiss. 3:47. 1895. 



Graphis virginalis Tuck.; Eckf., Bull. Torr. Club 17:256. 1890. 



Thallus thin, smooth, somewhat shining, dark greenish gray to olive-green; 

 apothecia short and narrow, 1-3 X 0.15-0.25 mm., immersed to semisuperficial, 

 covered by the thallus or breaking through, straight to curved or flexuous, usually 

 occurring in whitish groups but seldom branched, the disk at first covered by the 

 thalloid exciple, but finally opening and pale flesh-colored to brownish, the proper 

 exciple pale or darker brownish covered laterally by a thalloid one; hypothecium 

 hyaline; spores 8, ellipsoid, 5-9-septate transversely and 1-3-septate longitudinally, 

 24-35 X 12-18 yu.. 



On trees, Florida. 



6. Graphina adscribens (Nyl.) Mull. Arg., Bull. Herb. Boiss. 3:46. 1895. 



Graphis adscribens Nyl., Bull. Soc. Linn. Norm. II. 2:117, 118. 1868. 



Thallus thin, greenish gray to white or whitish, smooth to slightly rough; 

 apothecia long and rather wide, 3-8 X 0.4-0.9 mm., partly immersed, curved and 

 flexuous, rarely branched, the disk closed or slightly open and yellowish brown, 

 the proper exciple brown, obscurely striate, mostly covered by a thalloid one; 

 hypothecium hyaline; spores 8, ellipsoid, 6-7-septate transversely and 2-septate 

 longitudinally, 21-28 X 8-10 /x. 



On trees, Florida. 



7. Graphina Scolecitis (Tuck.) Fink n. comb. 

 Graphis Scolecitis Tuck., Gen. Lich. 210. 1872. 



Thallus smooth, very thin and indistinct, greenish gray to olive-green, often 

 bordered and intersected by black lines; apothecia long and narrow, 2-6 X 

 0.2-0.35 mm., partly immersed, curved or flexuous, infrequently once to radiately 

 branched, the disk closed, the proper exciple brown, covered wholly or laterally by 

 a very thin thalloid one; hypothecium hyaline; asci cylindrico-clavate to saccate; 

 spores 8, oblong-ellipsoid, 3-7-septate transversely and 2-3-septate longitudinally, 

 14-25 X 6-9 jx. 



On trees, Florida and Alabama. 



